diff --git a/backend/Cargo.lock b/backend/Cargo.lock
index 82681fb..3c098c3 100644
--- a/backend/Cargo.lock
+++ b/backend/Cargo.lock
@@ -799,7 +799,7 @@ dependencies = [
 
 [[package]]
 name = "limits_core"
-version = "1.0.0"
+version = "2.0.0"
 dependencies = [
  "serde",
  "serde_json",
diff --git a/backend/Cargo.toml b/backend/Cargo.toml
index c441c74..b6d2e47 100644
--- a/backend/Cargo.toml
+++ b/backend/Cargo.toml
@@ -25,7 +25,7 @@ log = "0.4"
 simplelog = "0.12"
 
 # limits & driver functionality
-limits_core = { version = "1.0.0", path = "./limits_core" }
+limits_core = { version = "2", path = "./limits_core" }
 regex = "1"
 libryzenadj = { version = "0.12" }
 # ureq's tls feature does not like musl targets
diff --git a/backend/limits_core/Cargo.lock b/backend/limits_core/Cargo.lock
index 1914c35..ac3e0ed 100644
--- a/backend/limits_core/Cargo.lock
+++ b/backend/limits_core/Cargo.lock
@@ -10,7 +10,7 @@ checksum = "453ad9f582a441959e5f0d088b02ce04cfe8d51a8eaf077f12ac6d3e94164ca6"
 
 [[package]]
 name = "limits_core"
-version = "1.0.0"
+version = "2.0.0"
 dependencies = [
  "serde",
  "serde_json",
diff --git a/backend/limits_core/Cargo.toml b/backend/limits_core/Cargo.toml
index 2bb9e77..7dd5c63 100644
--- a/backend/limits_core/Cargo.toml
+++ b/backend/limits_core/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "limits_core"
-version = "1.0.0"
+version = "2.0.0"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
diff --git a/backend/limits_core/src/json/base.rs b/backend/limits_core/src/json/base.rs
index d6e013c..41e9801 100644
--- a/backend/limits_core/src/json/base.rs
+++ b/backend/limits_core/src/json/base.rs
@@ -57,16 +57,16 @@ impl Default for Base {
                     },
                     limits: vec![
                         super::Limits::Cpu(super::CpuLimit::GenericAMD(super::GenericCpuLimit {
-                            clock_min: Some(super::RangeLimit { min: 1000, max: 3700 }),
-                            clock_max: Some(super::RangeLimit { min: 1000, max: 3700 }),
+                            clock_min: Some(super::RangeLimit { min: Some(1000), max: Some(3700) }),
+                            clock_max: Some(super::RangeLimit { min: Some(1000), max: Some(3700) }),
                             clock_step: 100,
                         })),
                         super::Limits::Gpu(super::GpuLimit::GenericAMD(super::GenericGpuLimit {
-                            fast_ppt: Some(super::RangeLimit { min: 1_000_000, max: 25_000_000 }),
-                            slow_ppt: Some(super::RangeLimit { min: 1_000_000, max: 25_000_000 }),
+                            fast_ppt: Some(super::RangeLimit { min: Some(1_000_000), max: Some(25_000_000) }),
+                            slow_ppt: Some(super::RangeLimit { min: Some(1_000_000), max: Some(25_000_000) }),
                             ppt_step: Some(1_000_000),
-                            clock_min: Some(super::RangeLimit { min: 400, max: 1100 }),
-                            clock_max: Some(super::RangeLimit { min: 400, max: 1100 }),
+                            clock_min: Some(super::RangeLimit { min: Some(400), max: Some(1100) }),
+                            clock_max: Some(super::RangeLimit { min: Some(400), max: Some(1100) }),
                             clock_step: Some(100),
                             ..Default::default()
                         })),
@@ -84,16 +84,16 @@ impl Default for Base {
                     },
                     limits: vec![
                         super::Limits::Cpu(super::CpuLimit::GenericAMD(super::GenericCpuLimit {
-                            clock_min: Some(super::RangeLimit { min: 1000, max: 4000 }),
-                            clock_max: Some(super::RangeLimit { min: 1000, max: 4000 }),
+                            clock_min: Some(super::RangeLimit { min: Some(1000), max: Some(4000) }),
+                            clock_max: Some(super::RangeLimit { min: Some(1000), max: Some(4000) }),
                             clock_step: 100,
                         })),
                         super::Limits::Gpu(super::GpuLimit::GenericAMD(super::GenericGpuLimit {
-                            fast_ppt: Some(super::RangeLimit { min: 1_000_000, max: 25_000_000 }),
-                            slow_ppt: Some(super::RangeLimit { min: 1_000_000, max: 25_000_000 }),
+                            fast_ppt: Some(super::RangeLimit { min: Some(1_000_000), max: Some(25_000_000) }),
+                            slow_ppt: Some(super::RangeLimit { min: Some(1_000_000), max: Some(25_000_000) }),
                             ppt_step: Some(1_000_000),
-                            clock_min: Some(super::RangeLimit { min: 400, max: 1600 }),
-                            clock_max: Some(super::RangeLimit { min: 400, max: 1600 }),
+                            clock_min: Some(super::RangeLimit { min: Some(400), max: Some(1600) }),
+                            clock_max: Some(super::RangeLimit { min: Some(400), max: Some(1600) }),
                             clock_step: Some(100),
                             ..Default::default()
                         })),
@@ -111,16 +111,16 @@ impl Default for Base {
                     },
                     limits: vec![
                         super::Limits::Cpu(super::CpuLimit::GenericAMD(super::GenericCpuLimit {
-                            clock_min: Some(super::RangeLimit { min: 1000, max: 4500 }),
-                            clock_max: Some(super::RangeLimit { min: 1000, max: 4500 }),
+                            clock_min: Some(super::RangeLimit { min: Some(1000), max: Some(4500) }),
+                            clock_max: Some(super::RangeLimit { min: Some(1000), max: Some(4500) }),
                             clock_step: 100,
                         })),
                         super::Limits::Gpu(super::GpuLimit::GenericAMD(super::GenericGpuLimit {
-                            fast_ppt: Some(super::RangeLimit { min: 1_000_000, max: 25_000_000 }),
-                            slow_ppt: Some(super::RangeLimit { min: 1_000_000, max: 25_000_000 }),
+                            fast_ppt: Some(super::RangeLimit { min: Some(1_000_000), max: Some(25_000_000) }),
+                            slow_ppt: Some(super::RangeLimit { min: Some(1_000_000), max: Some(25_000_000) }),
                             ppt_step: Some(1_000_000),
-                            clock_min: Some(super::RangeLimit { min: 400, max: 2000 }),
-                            clock_max: Some(super::RangeLimit { min: 400, max: 2000 }),
+                            clock_min: Some(super::RangeLimit { min: Some(400), max: Some(2000) }),
+                            clock_max: Some(super::RangeLimit { min: Some(400), max: Some(2000) }),
                             clock_step: Some(100),
                             ..Default::default()
                         })),
@@ -138,16 +138,16 @@ impl Default for Base {
                     },
                     limits: vec![
                         super::Limits::Cpu(super::CpuLimit::Generic(super::GenericCpuLimit {
-                            clock_min: Some(super::RangeLimit { min: 1000, max: 4700 }),
-                            clock_max: Some(super::RangeLimit { min: 1000, max: 4700 }),
+                            clock_min: Some(super::RangeLimit { min: Some(1000), max: Some(4700) }),
+                            clock_max: Some(super::RangeLimit { min: Some(1000), max: Some(4700) }),
                             clock_step: 100,
                         })),
                         super::Limits::Gpu(super::GpuLimit::Generic(super::GenericGpuLimit {
-                            fast_ppt: Some(super::RangeLimit { min: 1_000_000, max: 28_000_000 }),
-                            slow_ppt: Some(super::RangeLimit { min: 1_000_000, max: 28_000_000 }),
+                            fast_ppt: Some(super::RangeLimit { min: Some(1_000_000), max: Some(28_000_000) }),
+                            slow_ppt: Some(super::RangeLimit { min: Some(1_000_000), max: Some(28_000_000) }),
                             ppt_step: Some(1_000_000),
-                            clock_min: Some(super::RangeLimit { min: 400, max: 2200 }),
-                            clock_max: Some(super::RangeLimit { min: 400, max: 2200 }),
+                            clock_min: Some(super::RangeLimit { min: Some(400), max: Some(2200) }),
+                            clock_max: Some(super::RangeLimit { min: Some(400), max: Some(2200) }),
                             clock_step: Some(100),
                             ..Default::default()
                         })),
diff --git a/backend/limits_core/src/json/range.rs b/backend/limits_core/src/json/range.rs
index 2ea3718..49135eb 100644
--- a/backend/limits_core/src/json/range.rs
+++ b/backend/limits_core/src/json/range.rs
@@ -3,6 +3,6 @@ use serde::{Deserialize, Serialize};
 /// Base JSON limits information
 #[derive(Serialize, Deserialize, Debug, Clone)]
 pub struct RangeLimit<T> {
-    pub min: T,
-    pub max: T,
+    pub min: Option<T>,
+    pub max: Option<T>,
 }
diff --git a/backend/limits_srv/Cargo.toml b/backend/limits_srv/Cargo.toml
index 67305c8..11cd344 100644
--- a/backend/limits_srv/Cargo.toml
+++ b/backend/limits_srv/Cargo.toml
@@ -1,12 +1,12 @@
 [package]
 name = "limits_srv"
-version = "1.0.0"
+version = "2.0.0"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-limits_core = { version = "1.0.0", path = "../limits_core" }
+limits_core = { version = "2.0.0", path = "../limits_core" }
 chrono = { version = "0.4" }
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
diff --git a/backend/src/api/api_types.rs b/backend/src/api/api_types.rs
index aa904b5..8d72107 100644
--- a/backend/src/api/api_types.rs
+++ b/backend/src/api/api_types.rs
@@ -1,18 +1,14 @@
 use serde::{Deserialize, Serialize};
 
-#[derive(Serialize, Deserialize)]
+#[derive(Serialize, Deserialize, Clone, Debug)]
 pub struct RangeLimit<T> {
     pub min: T,
     pub max: T,
 }
 
-impl<T> From<limits_core::json::RangeLimit<T>> for RangeLimit<T> {
-    #[inline]
-    fn from(other: limits_core::json::RangeLimit<T>) -> Self {
-        RangeLimit {
-            min: other.min,
-            max: other.max,
-        }
+impl<T> RangeLimit<T> {
+    pub fn new(min: T, max: T) -> Self {
+        Self { min, max }
     }
 }
 
diff --git a/backend/src/api/cpu.rs b/backend/src/api/cpu.rs
index c737aac..bd19eab 100644
--- a/backend/src/api/cpu.rs
+++ b/backend/src/api/cpu.rs
@@ -6,6 +6,7 @@ use usdpl_back::AsyncCallable;
 use crate::settings::{MinMax, SettingError, SettingVariant};
 //use crate::utility::{unwrap_lock, unwrap_maybe_fatal};
 use super::handler::{ApiMessage, CpuMessage};
+use super::utility::map_optional;
 
 /// Available CPUs web method
 pub fn max_cpus(_: super::ApiParameterType) -> super::ApiParameterType {
@@ -205,8 +206,8 @@ pub fn set_clock_limits(
                     setter(
                         index as usize,
                         MinMax {
-                            min: safe_min as u64,
-                            max: safe_max as u64,
+                            min: Some(safe_min as u64),
+                            max: Some(safe_max as u64),
                         },
                     );
                     vec![safe_min.into(), safe_max.into()]
@@ -220,6 +221,7 @@ pub fn set_clock_limits(
             vec!["set_clock_limits missing parameter 0".into()]
         }
     }
+    // TODO allow param 0 and/or 1 to be Primitive::Empty
 }
 
 pub fn get_clock_limits(
@@ -245,7 +247,7 @@ pub fn get_clock_limits(
     move |params_in: super::ApiParameterType| {
         if let Some(&Primitive::F64(index)) = params_in.get(0) {
             if let Some(min_max) = getter(index as usize) {
-                vec![min_max.min.into(), min_max.max.into()]
+                vec![map_optional(min_max.min), map_optional(min_max.max)]
             } else {
                 vec![Primitive::Empty, Primitive::Empty]
             }
diff --git a/backend/src/api/gpu.rs b/backend/src/api/gpu.rs
index 3829d30..320a331 100644
--- a/backend/src/api/gpu.rs
+++ b/backend/src/api/gpu.rs
@@ -3,6 +3,7 @@ use std::sync::{Arc, Mutex};
 use usdpl_back::core::serdes::Primitive;
 use usdpl_back::AsyncCallable;
 
+use super::utility::map_optional;
 use crate::settings::MinMax;
 //use crate::utility::{unwrap_lock, unwrap_maybe_fatal};
 use super::handler::{ApiMessage, GpuMessage};
@@ -94,8 +95,8 @@ pub fn set_clock_limits(
                 let safe_max = if max < min { min } else { max };
                 let safe_min = if min > max { max } else { min };
                 setter(MinMax {
-                    min: safe_min as _,
-                    max: safe_max as _,
+                    min: Some(safe_min as _),
+                    max: Some(safe_max as _),
                 });
                 vec![(safe_min as u64).into(), (safe_max as u64).into()]
             } else {
@@ -105,6 +106,7 @@ pub fn set_clock_limits(
             vec!["set_clock_limits missing parameter 0".into()]
         }
     }
+    // TODO allow param 0 and/or 1 to be Primitive::Empty
 }
 
 pub fn get_clock_limits(sender: Sender<ApiMessage>) -> impl AsyncCallable {
@@ -131,7 +133,7 @@ pub fn get_clock_limits(sender: Sender<ApiMessage>) -> impl AsyncCallable {
         set_get: getter,
         trans_getter: |clocks: Option<MinMax<u64>>| {
             clocks
-                .map(|x| vec![x.min.into(), x.max.into()])
+                .map(|x| vec![map_optional(x.min), map_optional(x.max)])
                 .unwrap_or_else(|| vec![Primitive::Empty, Primitive::Empty])
         },
     }
diff --git a/backend/src/api/handler.rs b/backend/src/api/handler.rs
index 57f57f5..2ff576a 100644
--- a/backend/src/api/handler.rs
+++ b/backend/src/api/handler.rs
@@ -268,7 +268,9 @@ impl ApiMessageHandler {
             while let Ok(msg) = self.intake.try_recv() {
                 dirty |= self.process(settings, msg);
             }
-            if dirty /*|| dirty_echo */ {
+            if dirty
+            /*|| dirty_echo */
+            {
                 //dirty_echo = dirty; // echo only once
 
                 // run on_set
diff --git a/backend/src/api/utility.rs b/backend/src/api/utility.rs
index 7cec146..fda4404 100644
--- a/backend/src/api/utility.rs
+++ b/backend/src/api/utility.rs
@@ -19,10 +19,7 @@ pub fn map_optional_result<T: Into<Primitive>>(
     result: Result<Option<T>, SettingError>,
 ) -> super::ApiParameterType {
     match result {
-        Ok(val) => match val {
-            Some(val) => vec![val.into()],
-            None => vec![Primitive::Empty],
-        },
+        Ok(val) => vec![map_optional(val)],
         Err(e) => {
             log::debug!("Mapping error to primitive: {}", e);
             vec![e.msg.into()]
@@ -30,6 +27,13 @@ pub fn map_optional_result<T: Into<Primitive>>(
     }
 }
 
+pub fn map_optional<T: Into<Primitive>>(option: Option<T>) -> Primitive {
+    match option {
+        Some(val) => val.into(),
+        None => Primitive::Empty,
+    }
+}
+
 /*#[inline]
 pub fn map_empty_result<T: Into<Primitive>>(
     result: Result<(), SettingError>,
diff --git a/backend/src/persist/general.rs b/backend/src/persist/general.rs
index d012743..9148675 100644
--- a/backend/src/persist/general.rs
+++ b/backend/src/persist/general.rs
@@ -58,6 +58,6 @@ impl SettingsJson {
 
 #[derive(Serialize, Deserialize, Clone)]
 pub struct MinMaxJson<T> {
-    pub max: T,
-    pub min: T,
+    pub max: Option<T>,
+    pub min: Option<T>,
 }
diff --git a/backend/src/settings/generic/cpu.rs b/backend/src/settings/generic/cpu.rs
index 3e838ce..b821053 100644
--- a/backend/src/settings/generic/cpu.rs
+++ b/backend/src/settings/generic/cpu.rs
@@ -3,6 +3,7 @@ use std::convert::{AsMut, AsRef, Into};
 use limits_core::json::GenericCpuLimit;
 
 use super::FromGenericCpuInfo;
+use crate::api::RangeLimit;
 use crate::persist::CpuJson;
 use crate::settings::{min_max_from_json, MinMax};
 use crate::settings::{OnResume, OnSet, SettingError};
@@ -330,8 +331,16 @@ impl Cpu {
 
     fn limits(&self) -> crate::api::CpuLimits {
         crate::api::CpuLimits {
-            clock_min_limits: self.limits.clock_min.clone().map(|x| x.into()),
-            clock_max_limits: self.limits.clock_max.clone().map(|x| x.into()),
+            clock_min_limits: self
+                .limits
+                .clock_min
+                .clone()
+                .map(|x| RangeLimit::new(x.min.unwrap_or(0), x.max.unwrap_or(5_000))),
+            clock_max_limits: self
+                .limits
+                .clock_max
+                .clone()
+                .map(|x| RangeLimit::new(x.min.unwrap_or(0), x.max.unwrap_or(5_000))),
             clock_step: self.limits.clock_step,
             governors: self.governors(),
         }
diff --git a/backend/src/settings/generic/gpu.rs b/backend/src/settings/generic/gpu.rs
index f8d1a5c..b388df1 100644
--- a/backend/src/settings/generic/gpu.rs
+++ b/backend/src/settings/generic/gpu.rs
@@ -2,6 +2,7 @@ use std::convert::Into;
 
 use limits_core::json::GenericGpuLimit;
 
+use crate::api::RangeLimit;
 use crate::persist::GpuJson;
 use crate::settings::TGpu;
 use crate::settings::{min_max_from_json, MinMax};
@@ -97,14 +98,38 @@ impl crate::settings::OnPowerEvent for Gpu {}
 impl TGpu for Gpu {
     fn limits(&self) -> crate::api::GpuLimits {
         crate::api::GpuLimits {
-            fast_ppt_limits: self.limits.fast_ppt.clone().map(|x| x.into()),
-            slow_ppt_limits: self.limits.slow_ppt.clone().map(|x| x.into()),
+            fast_ppt_limits: self
+                .limits
+                .fast_ppt
+                .clone()
+                .map(|x| RangeLimit::new(x.min.unwrap_or(0), x.max.unwrap_or(15_000_000))),
+            slow_ppt_limits: self
+                .limits
+                .slow_ppt
+                .clone()
+                .map(|x| RangeLimit::new(x.min.unwrap_or(0), x.max.unwrap_or(15_000_000))),
             ppt_step: self.limits.ppt_step.unwrap_or(1_000_000),
-            tdp_limits: self.limits.tdp.clone().map(|x| x.into()),
-            tdp_boost_limits: self.limits.tdp_boost.clone().map(|x| x.into()),
+            tdp_limits: self
+                .limits
+                .tdp
+                .clone()
+                .map(|x| RangeLimit::new(x.min.unwrap_or(0), x.max.unwrap_or(15_000_000))),
+            tdp_boost_limits: self
+                .limits
+                .tdp_boost
+                .clone()
+                .map(|x| RangeLimit::new(x.min.unwrap_or(0), x.max.unwrap_or(15_000_000))),
             tdp_step: self.limits.tdp_step.unwrap_or(42),
-            clock_min_limits: self.limits.clock_min.clone().map(|x| x.into()),
-            clock_max_limits: self.limits.clock_max.clone().map(|x| x.into()),
+            clock_min_limits: self
+                .limits
+                .clock_min
+                .clone()
+                .map(|x| RangeLimit::new(x.min.unwrap_or(0), x.max.unwrap_or(3_000))),
+            clock_max_limits: self
+                .limits
+                .clock_max
+                .clone()
+                .map(|x| RangeLimit::new(x.min.unwrap_or(0), x.max.unwrap_or(3_000))),
             clock_step: self.limits.clock_step.unwrap_or(100),
             memory_control_capable: false,
         }
@@ -116,10 +141,20 @@ impl TGpu for Gpu {
 
     fn ppt(&mut self, fast: Option<u64>, slow: Option<u64>) {
         if let Some(fast_lims) = &self.limits.fast_ppt {
-            self.fast_ppt = fast.map(|x| x.clamp(fast_lims.min, fast_lims.max));
+            self.fast_ppt = fast.map(|x| {
+                x.clamp(
+                    fast_lims.min.unwrap_or(0),
+                    fast_lims.max.unwrap_or(u64::MAX),
+                )
+            });
         }
         if let Some(slow_lims) = &self.limits.slow_ppt {
-            self.slow_ppt = slow.map(|x| x.clamp(slow_lims.min, slow_lims.max));
+            self.slow_ppt = slow.map(|x| {
+                x.clamp(
+                    slow_lims.min.unwrap_or(0),
+                    slow_lims.max.unwrap_or(u64::MAX),
+                )
+            });
         }
     }
 
diff --git a/backend/src/settings/generic_amd/gpu.rs b/backend/src/settings/generic_amd/gpu.rs
index 841393b..9af3bc2 100644
--- a/backend/src/settings/generic_amd/gpu.rs
+++ b/backend/src/settings/generic_amd/gpu.rs
@@ -128,24 +128,22 @@ impl Gpu {
         }
         if let Some(clock_limits) = &self.generic.clock_limits {
             self.state.clock_limits_set = true;
-            lock.set_max_gfxclk_freq(clock_limits.max as _)
-                .map_err(|e| SettingError {
-                    msg: format!(
-                        "RyzenAdj set_max_gfxclk_freq({}) err: {}",
-                        clock_limits.max, e
-                    ),
-                    setting: SettingVariant::Gpu,
-                })
-                .unwrap_or_else(|e| errors.push(e));
-            lock.set_min_gfxclk_freq(clock_limits.min as _)
-                .map_err(|e| SettingError {
-                    msg: format!(
-                        "RyzenAdj set_min_gfxclk_freq({}) err: {}",
-                        clock_limits.min, e
-                    ),
-                    setting: SettingVariant::Gpu,
-                })
-                .unwrap_or_else(|e| errors.push(e));
+            if let Some(max) = clock_limits.max {
+                lock.set_max_gfxclk_freq(max as _)
+                    .map_err(|e| SettingError {
+                        msg: format!("RyzenAdj set_max_gfxclk_freq({}) err: {}", max, e),
+                        setting: SettingVariant::Gpu,
+                    })
+                    .unwrap_or_else(|e| errors.push(e));
+            }
+            if let Some(min) = clock_limits.min {
+                lock.set_min_gfxclk_freq(min as _)
+                    .map_err(|e| SettingError {
+                        msg: format!("RyzenAdj set_min_gfxclk_freq({}) err: {}", min, e),
+                        setting: SettingVariant::Gpu,
+                    })
+                    .unwrap_or_else(|e| errors.push(e));
+            }
         } else if self.state.clock_limits_set {
             self.state.clock_limits_set = false;
             let limits = self.generic.limits();
@@ -218,24 +216,22 @@ impl Gpu {
                 .unwrap_or_else(|e| errors.push(e));
         }
         if let Some(clock_limits) = &self.generic.clock_limits {
-            lock.set_max_gfxclk_freq(clock_limits.max as _)
-                .map_err(|e| SettingError {
-                    msg: format!(
-                        "RyzenAdj set_max_gfxclk_freq({}) err: {}",
-                        clock_limits.max, e
-                    ),
-                    setting: SettingVariant::Gpu,
-                })
-                .unwrap_or_else(|e| errors.push(e));
-            lock.set_min_gfxclk_freq(clock_limits.min as _)
-                .map_err(|e| SettingError {
-                    msg: format!(
-                        "RyzenAdj set_min_gfxclk_freq({}) err: {}",
-                        clock_limits.min, e
-                    ),
-                    setting: SettingVariant::Gpu,
-                })
-                .unwrap_or_else(|e| errors.push(e));
+            if let Some(max) = clock_limits.max {
+                lock.set_max_gfxclk_freq(max as _)
+                    .map_err(|e| SettingError {
+                        msg: format!("RyzenAdj set_max_gfxclk_freq({}) err: {}", max, e),
+                        setting: SettingVariant::Gpu,
+                    })
+                    .unwrap_or_else(|e| errors.push(e));
+            }
+            if let Some(min) = clock_limits.min {
+                lock.set_min_gfxclk_freq(min as _)
+                    .map_err(|e| SettingError {
+                        msg: format!("RyzenAdj set_min_gfxclk_freq({}) err: {}", min, e),
+                        setting: SettingVariant::Gpu,
+                    })
+                    .unwrap_or_else(|e| errors.push(e));
+            }
         }
         Ok(())
     }
diff --git a/backend/src/settings/min_max.rs b/backend/src/settings/min_max.rs
index c1c9563..e307268 100644
--- a/backend/src/settings/min_max.rs
+++ b/backend/src/settings/min_max.rs
@@ -8,8 +8,8 @@ pub type MinMax<T> = RangeLimit<T>;
 
 pub fn min_max_from_json<T, X: Into<T>>(other: MinMaxJson<X>, _version: u64) -> MinMax<T> {
     MinMax {
-        max: other.max.into(),
-        min: other.min.into(),
+        max: other.max.map(|x| x.into()),
+        min: other.min.map(|x| x.into()),
     }
 }
 
@@ -17,8 +17,8 @@ impl<X: Into<Y>, Y> Into<MinMaxJson<Y>> for RangeLimit<X> {
     #[inline]
     fn into(self) -> MinMaxJson<Y> {
         MinMaxJson {
-            max: self.max.into(),
-            min: self.min.into(),
+            max: self.max.map(|x| x.into()),
+            min: self.min.map(|x| x.into()),
         }
     }
 }
diff --git a/backend/src/settings/steam_deck/battery.rs b/backend/src/settings/steam_deck/battery.rs
index 4a5305c..9ea5372 100644
--- a/backend/src/settings/steam_deck/battery.rs
+++ b/backend/src/settings/steam_deck/battery.rs
@@ -99,12 +99,12 @@ impl EventInstruction {
                 .trim_start_matches('>')
                 .parse::<f64>()
                 .ok()
-                .map(|x| EventTrigger::BatteryAbove(x/100.0)),
+                .map(|x| EventTrigger::BatteryAbove(x / 100.0)),
             s if s.starts_with('<') => s
                 .trim_start_matches('<')
                 .parse::<f64>()
                 .ok()
-                .map(|x| EventTrigger::BatteryBelow(x/100.0)),
+                .map(|x| EventTrigger::BatteryBelow(x / 100.0)),
             _ => None,
         }
     }
@@ -244,6 +244,30 @@ impl Battery {
         }
     }
 
+    fn set_charge_rate(&mut self) -> Result<(), SettingError> {
+        if let Some(charge_rate) = self.charge_rate {
+            self.state.charge_rate_set = true;
+            usdpl_back::api::files::write_single(BATTERY_CHARGE_RATE_PATH, charge_rate).map_err(
+                |e| SettingError {
+                    msg: format!("Failed to write to `{}`: {}", BATTERY_CHARGE_RATE_PATH, e),
+                    setting: crate::settings::SettingVariant::Battery,
+                },
+            )
+        } else if self.state.charge_rate_set {
+            self.state.charge_rate_set = false;
+            usdpl_back::api::files::write_single(
+                BATTERY_CHARGE_RATE_PATH,
+                self.limits.charge_rate.max,
+            )
+            .map_err(|e| SettingError {
+                msg: format!("Failed to write to `{}`: {}", BATTERY_CHARGE_RATE_PATH, e),
+                setting: crate::settings::SettingVariant::Battery,
+            })
+        } else {
+            Ok(())
+        }
+    }
+
     fn set_charge_mode(&mut self) -> Result<(), SettingError> {
         if let Some(charge_mode) = self.charge_mode {
             self.state.charge_mode_set = true;
@@ -268,26 +292,7 @@ impl Battery {
 
     fn set_all(&mut self) -> Result<(), Vec<SettingError>> {
         let mut errors = Vec::new();
-        if let Some(charge_rate) = self.charge_rate {
-            self.state.charge_rate_set = true;
-            usdpl_back::api::files::write_single(BATTERY_CHARGE_RATE_PATH, charge_rate)
-                .map_err(|e| SettingError {
-                    msg: format!("Failed to write to `{}`: {}", BATTERY_CHARGE_RATE_PATH, e),
-                    setting: crate::settings::SettingVariant::Battery,
-                })
-                .unwrap_or_else(|e| errors.push(e));
-        } else if self.state.charge_rate_set {
-            self.state.charge_rate_set = false;
-            usdpl_back::api::files::write_single(
-                BATTERY_CHARGE_RATE_PATH,
-                self.limits.charge_rate.max,
-            )
-            .map_err(|e| SettingError {
-                msg: format!("Failed to write to `{}`: {}", BATTERY_CHARGE_RATE_PATH, e),
-                setting: crate::settings::SettingVariant::Battery,
-            })
-            .unwrap_or_else(|e| errors.push(e));
-        }
+        self.set_charge_rate().unwrap_or_else(|e| errors.push(e));
         self.set_charge_mode().unwrap_or_else(|e| errors.push(e));
         if errors.is_empty() {
             Ok(())
diff --git a/backend/src/settings/steam_deck/cpu.rs b/backend/src/settings/steam_deck/cpu.rs
index 91ec128..58c315e 100644
--- a/backend/src/settings/steam_deck/cpu.rs
+++ b/backend/src/settings/steam_deck/cpu.rs
@@ -234,6 +234,11 @@ pub struct Cpu {
 
 const CPU_CLOCK_LIMITS_PATH: &str = "/sys/class/drm/card0/device/pp_od_clk_voltage";
 
+enum ClockType {
+    Min = 0,
+    Max = 1,
+}
+
 impl Cpu {
     #[inline]
     fn from_json(other: CpuJson, version: u64, i: usize, oc_limits: CpuLimits) -> Self {
@@ -257,86 +262,91 @@ impl Cpu {
         }
     }
 
-    fn set_force_performance_related(&mut self) -> Result<(), Vec<SettingError>> {
-        let mut errors = Vec::new();
+    fn set_clock_limit(index: usize, speed: u64, mode: ClockType) -> Result<(), SettingError> {
+        let payload = format!("p {} {} {}\n", index / 2, mode as u8, speed);
+        usdpl_back::api::files::write_single(CPU_CLOCK_LIMITS_PATH, &payload).map_err(|e| {
+            SettingError {
+                msg: format!(
+                    "Failed to write `{}` to `{}`: {}",
+                    &payload, CPU_CLOCK_LIMITS_PATH, e
+                ),
+                setting: crate::settings::SettingVariant::Cpu,
+            }
+        })
+    }
 
-        // set clock limits
-        //log::debug!("Setting {} to manual", CPU_FORCE_LIMITS_PATH);
-        //let mode: String = usdpl_back::api::files::read_single(CPU_FORCE_LIMITS_PATH.to_owned()).unwrap();
+    fn set_clock_limits(&mut self) -> Result<(), Vec<SettingError>> {
+        let mut errors = Vec::new();
         if let Some(clock_limits) = &self.clock_limits {
             POWER_DPM_FORCE_PERFORMANCE_LEVEL_MGMT.set_cpu(true, self.index);
             POWER_DPM_FORCE_PERFORMANCE_LEVEL_MGMT.enforce_level()?;
             log::debug!(
-                "Setting CPU {} (min, max) clockspeed to ({}, {})",
+                "Setting CPU {} (min, max) clockspeed to ({:?}, {:?})",
                 self.index,
                 clock_limits.min,
                 clock_limits.max
             );
             self.state.clock_limits_set = true;
             // max clock
-            let payload_max = format!("p {} 1 {}\n", self.index / 2, clock_limits.max);
-            usdpl_back::api::files::write_single(CPU_CLOCK_LIMITS_PATH, &payload_max)
-                .map_err(|e| SettingError {
-                    msg: format!(
-                        "Failed to write `{}` to `{}`: {}",
-                        &payload_max, CPU_CLOCK_LIMITS_PATH, e
-                    ),
-                    setting: crate::settings::SettingVariant::Cpu,
-                })
-                .unwrap_or_else(|e| errors.push(e));
+            if let Some(max) = clock_limits.max {
+                Self::set_clock_limit(self.index, max, ClockType::Max)
+                    .unwrap_or_else(|e| errors.push(e));
+            }
             // min clock
-            let valid_min = if clock_limits.min < self.limits.clock_min.min {
-                self.limits.clock_min.min
+            if let Some(min) = clock_limits.min {
+                let valid_min = if min < self.limits.clock_min.min {
+                    self.limits.clock_min.min
+                } else {
+                    min
+                };
+                Self::set_clock_limit(self.index, valid_min, ClockType::Min)
+                    .unwrap_or_else(|e| errors.push(e));
+            }
+
+            if errors.is_empty() {
+                Ok(())
             } else {
-                clock_limits.min
-            };
-            let payload_min = format!("p {} 0 {}\n", self.index / 2, valid_min);
-            usdpl_back::api::files::write_single(CPU_CLOCK_LIMITS_PATH, &payload_min)
-                .map_err(|e| SettingError {
-                    msg: format!(
-                        "Failed to write `{}` to `{}`: {}",
-                        &payload_min, CPU_CLOCK_LIMITS_PATH, e
-                    ),
-                    setting: crate::settings::SettingVariant::Cpu,
-                })
-                .unwrap_or_else(|e| errors.push(e));
+                Err(errors)
+            }
         } else if self.state.clock_limits_set
             || (self.state.is_resuming && !self.limits.skip_resume_reclock)
             || POWER_DPM_FORCE_PERFORMANCE_LEVEL_MGMT.needs_manual()
         {
+            let mut errors = Vec::new();
             self.state.clock_limits_set = false;
+            POWER_DPM_FORCE_PERFORMANCE_LEVEL_MGMT.set_cpu(false, self.index);
             if POWER_DPM_FORCE_PERFORMANCE_LEVEL_MGMT.needs_manual() {
                 POWER_DPM_FORCE_PERFORMANCE_LEVEL_MGMT.enforce_level()?;
                 // disable manual clock limits
                 log::debug!("Setting CPU {} to default clockspeed", self.index);
                 // max clock
-                let payload_max = format!("p {} 1 {}\n", self.index / 2, self.limits.clock_max.max);
-                usdpl_back::api::files::write_single(CPU_CLOCK_LIMITS_PATH, &payload_max)
-                    .map_err(|e| SettingError {
-                        msg: format!(
-                            "Failed to write `{}` to `{}`: {}",
-                            &payload_max, CPU_CLOCK_LIMITS_PATH, e
-                        ),
-                        setting: crate::settings::SettingVariant::Cpu,
-                    })
+                Self::set_clock_limit(self.index, self.limits.clock_max.max, ClockType::Max)
                     .unwrap_or_else(|e| errors.push(e));
                 // min clock
-                let payload_min = format!("p {} 0 {}\n", self.index / 2, self.limits.clock_min.min);
-                usdpl_back::api::files::write_single(CPU_CLOCK_LIMITS_PATH, &payload_min)
-                    .map_err(|e| SettingError {
-                        msg: format!(
-                            "Failed to write `{}` to `{}`: {}",
-                            &payload_min, CPU_CLOCK_LIMITS_PATH, e
-                        ),
-                        setting: crate::settings::SettingVariant::Cpu,
-                    })
+                Self::set_clock_limit(self.index, self.limits.clock_min.min, ClockType::Min)
                     .unwrap_or_else(|e| errors.push(e));
             }
-            POWER_DPM_FORCE_PERFORMANCE_LEVEL_MGMT.set_cpu(false, self.index);
             POWER_DPM_FORCE_PERFORMANCE_LEVEL_MGMT
                 .enforce_level()
                 .unwrap_or_else(|mut e| errors.append(&mut e));
+            if errors.is_empty() {
+                Ok(())
+            } else {
+                Err(errors)
+            }
+        } else {
+            Ok(())
         }
+    }
+
+    fn set_force_performance_related(&mut self) -> Result<(), Vec<SettingError>> {
+        let mut errors = Vec::new();
+
+        // set clock limits
+        //log::debug!("Setting {} to manual", CPU_FORCE_LIMITS_PATH);
+        //let mode: String = usdpl_back::api::files::read_single(CPU_FORCE_LIMITS_PATH.to_owned()).unwrap();
+        self.set_clock_limits()
+            .unwrap_or_else(|mut e| errors.append(&mut e));
         // commit changes (if no errors have already occured)
         if errors.is_empty() {
             if POWER_DPM_FORCE_PERFORMANCE_LEVEL_MGMT.needs_manual() {
@@ -354,6 +364,23 @@ impl Cpu {
         }
     }
 
+    fn set_governor(&self) -> Result<(), SettingError> {
+        if self.index == 0 || self.online {
+            let governor_path = cpu_governor_path(self.index);
+            usdpl_back::api::files::write_single(&governor_path, &self.governor).map_err(|e| {
+                SettingError {
+                    msg: format!(
+                        "Failed to write `{}` to `{}`: {}",
+                        &self.governor, &governor_path, e
+                    ),
+                    setting: crate::settings::SettingVariant::Cpu,
+                }
+            })
+        } else {
+            Ok(())
+        }
+    }
+
     fn set_all(&mut self) -> Result<(), Vec<SettingError>> {
         let mut errors = Vec::new();
         // set cpu online/offline
@@ -371,19 +398,8 @@ impl Cpu {
         self.set_force_performance_related()
             .unwrap_or_else(|mut e| errors.append(&mut e));
 
-        // set governor
-        if self.index == 0 || self.online {
-            let governor_path = cpu_governor_path(self.index);
-            usdpl_back::api::files::write_single(&governor_path, &self.governor)
-                .map_err(|e| SettingError {
-                    msg: format!(
-                        "Failed to write `{}` to `{}`: {}",
-                        &self.governor, &governor_path, e
-                    ),
-                    setting: crate::settings::SettingVariant::Cpu,
-                })
-                .unwrap_or_else(|e| errors.push(e));
-        }
+        self.set_governor().unwrap_or_else(|e| errors.push(e));
+
         if errors.is_empty() {
             Ok(())
         } else {
@@ -393,12 +409,14 @@ impl Cpu {
 
     fn clamp_all(&mut self) {
         if let Some(clock_limits) = &mut self.clock_limits {
-            clock_limits.min = clock_limits
-                .min
-                .clamp(self.limits.clock_min.min, self.limits.clock_min.max);
-            clock_limits.max = clock_limits
-                .max
-                .clamp(self.limits.clock_max.min, self.limits.clock_max.max);
+            if let Some(min) = clock_limits.min {
+                clock_limits.min =
+                    Some(min.clamp(self.limits.clock_min.min, self.limits.clock_min.max));
+            }
+            if let Some(max) = clock_limits.max {
+                clock_limits.max =
+                    Some(max.clamp(self.limits.clock_max.min, self.limits.clock_max.max));
+            }
         }
     }
 
diff --git a/backend/src/settings/steam_deck/gpu.rs b/backend/src/settings/steam_deck/gpu.rs
index 83bf2bd..c44f3af 100644
--- a/backend/src/settings/steam_deck/gpu.rs
+++ b/backend/src/settings/steam_deck/gpu.rs
@@ -26,6 +26,11 @@ pub struct Gpu {
 const GPU_CLOCK_LIMITS_PATH: &str = "/sys/class/drm/card0/device/pp_od_clk_voltage";
 const GPU_MEMORY_DOWNCLOCK_PATH: &str = "/sys/class/drm/card0/device/pp_dpm_fclk";
 
+enum ClockType {
+    Min = 0,
+    Max = 1,
+}
+
 impl Gpu {
     #[inline]
     pub fn from_json(other: GpuJson, version: u64) -> Self {
@@ -57,6 +62,28 @@ impl Gpu {
         }
     }
 
+    fn set_clock_limit(speed: u64, mode: ClockType) -> Result<(), SettingError> {
+        let payload = format!("s {} {}\n", mode as u8, speed);
+        usdpl_back::api::files::write_single(GPU_CLOCK_LIMITS_PATH, &payload).map_err(|e| {
+            SettingError {
+                msg: format!(
+                    "Failed to write `{}` to `{}`: {}",
+                    &payload, GPU_CLOCK_LIMITS_PATH, e
+                ),
+                setting: crate::settings::SettingVariant::Gpu,
+            }
+        })
+    }
+
+    fn set_confirm() -> Result<(), SettingError> {
+        usdpl_back::api::files::write_single(GPU_CLOCK_LIMITS_PATH, "c\n").map_err(|e| {
+            SettingError {
+                msg: format!("Failed to write `c` to `{}`: {}", GPU_CLOCK_LIMITS_PATH, e),
+                setting: crate::settings::SettingVariant::Gpu,
+            }
+        })
+    }
+
     fn set_clocks(&mut self) -> Result<(), Vec<SettingError>> {
         let mut errors = Vec::new();
         if let Some(clock_limits) = &self.clock_limits {
@@ -65,81 +92,37 @@ impl Gpu {
             // set clock limits
             self.state.clock_limits_set = true;
             // max clock
-            let payload_max = format!("s 1 {}\n", clock_limits.max);
-            usdpl_back::api::files::write_single(GPU_CLOCK_LIMITS_PATH, &payload_max)
-                .map_err(|e| SettingError {
-                    msg: format!(
-                        "Failed to write `{}` to `{}`: {}",
-                        &payload_max, GPU_CLOCK_LIMITS_PATH, e
-                    ),
-                    setting: crate::settings::SettingVariant::Gpu,
-                })
-                .unwrap_or_else(|e| errors.push(e));
+            if let Some(max) = clock_limits.max {
+                Self::set_clock_limit(max, ClockType::Max).unwrap_or_else(|e| errors.push(e));
+            }
             // min clock
-            let payload_min = format!("s 0 {}\n", clock_limits.min);
-            usdpl_back::api::files::write_single(GPU_CLOCK_LIMITS_PATH, &payload_min)
-                .map_err(|e| SettingError {
-                    msg: format!(
-                        "Failed to write `{}` to `{}`: {}",
-                        &payload_min, GPU_CLOCK_LIMITS_PATH, e
-                    ),
-                    setting: crate::settings::SettingVariant::Gpu,
-                })
-                .unwrap_or_else(|e| errors.push(e));
-            usdpl_back::api::files::write_single(GPU_CLOCK_LIMITS_PATH, "c\n").unwrap_or_else(
-                |e| {
-                    errors.push(SettingError {
-                        msg: format!("Failed to write `c` to `{}`: {}", GPU_CLOCK_LIMITS_PATH, e),
-                        setting: crate::settings::SettingVariant::Gpu,
-                    })
-                },
-            );
+            if let Some(min) = clock_limits.min {
+                Self::set_clock_limit(min, ClockType::Min).unwrap_or_else(|e| errors.push(e));
+            }
+
+            Self::set_confirm().unwrap_or_else(|e| errors.push(e));
         } else if self.state.clock_limits_set
             || (self.state.is_resuming && !self.limits.skip_resume_reclock)
             || POWER_DPM_FORCE_PERFORMANCE_LEVEL_MGMT.needs_manual()
         {
             self.state.clock_limits_set = false;
+            POWER_DPM_FORCE_PERFORMANCE_LEVEL_MGMT.set_gpu(self.slow_memory);
             if POWER_DPM_FORCE_PERFORMANCE_LEVEL_MGMT.needs_manual() {
                 POWER_DPM_FORCE_PERFORMANCE_LEVEL_MGMT.enforce_level()?;
                 // disable manual clock limits
                 // max clock
-                let payload_max = format!("s 1 {}\n", self.limits.clock_max.max);
-                usdpl_back::api::files::write_single(GPU_CLOCK_LIMITS_PATH, &payload_max)
-                    .map_err(|e| SettingError {
-                        msg: format!(
-                            "Failed to write `{}` to `{}`: {}",
-                            &payload_max, GPU_CLOCK_LIMITS_PATH, e
-                        ),
-                        setting: crate::settings::SettingVariant::Gpu,
-                    })
+                Self::set_clock_limit(self.limits.clock_max.max, ClockType::Max)
                     .unwrap_or_else(|e| errors.push(e));
                 // min clock
-                let payload_min = format!("s 0 {}\n", self.limits.clock_min.min);
-                usdpl_back::api::files::write_single(GPU_CLOCK_LIMITS_PATH, &payload_min)
-                    .map_err(|e| SettingError {
-                        msg: format!(
-                            "Failed to write `{}` to `{}`: {}",
-                            &payload_min, GPU_CLOCK_LIMITS_PATH, e
-                        ),
-                        setting: crate::settings::SettingVariant::Gpu,
-                    })
+                Self::set_clock_limit(self.limits.clock_min.min, ClockType::Min)
                     .unwrap_or_else(|e| errors.push(e));
-                usdpl_back::api::files::write_single(GPU_CLOCK_LIMITS_PATH, "c\n").unwrap_or_else(
-                    |e| {
-                        errors.push(SettingError {
-                            msg: format!(
-                                "Failed to write `c` to `{}`: {}",
-                                GPU_CLOCK_LIMITS_PATH, e
-                            ),
-                            setting: crate::settings::SettingVariant::Gpu,
-                        })
-                    },
-                );
+
+                Self::set_confirm().unwrap_or_else(|e| errors.push(e));
+            } else {
+                POWER_DPM_FORCE_PERFORMANCE_LEVEL_MGMT
+                    .enforce_level()
+                    .unwrap_or_else(|mut e| errors.append(&mut e));
             }
-            POWER_DPM_FORCE_PERFORMANCE_LEVEL_MGMT.set_gpu(self.slow_memory);
-            POWER_DPM_FORCE_PERFORMANCE_LEVEL_MGMT
-                .enforce_level()
-                .unwrap_or_else(|mut e| errors.append(&mut e));
         }
         if errors.is_empty() {
             Ok(())
@@ -148,6 +131,15 @@ impl Gpu {
         }
     }
 
+    fn set_slow_memory(slow: bool) -> Result<(), SettingError> {
+        usdpl_back::api::files::write_single(GPU_MEMORY_DOWNCLOCK_PATH, slow as u8).map_err(|e| {
+            SettingError {
+                msg: format!("Failed to write to `{}`: {}", GPU_MEMORY_DOWNCLOCK_PATH, e),
+                setting: crate::settings::SettingVariant::Gpu,
+            }
+        })
+    }
+
     fn set_force_performance_related(&mut self) -> Result<(), Vec<SettingError>> {
         let mut errors = Vec::new();
         // enable/disable downclock of GPU memory (to 400Mhz?)
@@ -156,21 +148,9 @@ impl Gpu {
             POWER_DPM_FORCE_PERFORMANCE_LEVEL_MGMT
                 .enforce_level()
                 .unwrap_or_else(|mut e| errors.append(&mut e));
-            usdpl_back::api::files::write_single(GPU_MEMORY_DOWNCLOCK_PATH, self.slow_memory as u8)
-                .unwrap_or_else(|e| {
-                    errors.push(SettingError {
-                        msg: format!("Failed to write to `{}`: {}", GPU_MEMORY_DOWNCLOCK_PATH, e),
-                        setting: crate::settings::SettingVariant::Gpu,
-                    });
-                });
+            Self::set_slow_memory(self.slow_memory).unwrap_or_else(|e| errors.push(e));
         } else if POWER_DPM_FORCE_PERFORMANCE_LEVEL_MGMT.needs_manual() {
-            usdpl_back::api::files::write_single(GPU_MEMORY_DOWNCLOCK_PATH, self.slow_memory as u8)
-                .unwrap_or_else(|e| {
-                    errors.push(SettingError {
-                        msg: format!("Failed to write to `{}`: {}", GPU_MEMORY_DOWNCLOCK_PATH, e),
-                        setting: crate::settings::SettingVariant::Gpu,
-                    });
-                });
+            Self::set_slow_memory(self.slow_memory).unwrap_or_else(|e| errors.push(e));
             POWER_DPM_FORCE_PERFORMANCE_LEVEL_MGMT.set_gpu(self.clock_limits.is_some());
             POWER_DPM_FORCE_PERFORMANCE_LEVEL_MGMT
                 .enforce_level()
@@ -181,11 +161,9 @@ impl Gpu {
         // commit changes (if no errors have already occured)
         if errors.is_empty() {
             if self.slow_memory || self.clock_limits.is_some() {
-                usdpl_back::api::files::write_single(GPU_CLOCK_LIMITS_PATH, "c\n").map_err(|e| {
-                    vec![SettingError {
-                        msg: format!("Failed to write `c` to `{}`: {}", GPU_CLOCK_LIMITS_PATH, e),
-                        setting: crate::settings::SettingVariant::Gpu,
-                    }]
+                Self::set_confirm().map_err(|e| {
+                    errors.push(e);
+                    errors
                 })
             } else {
                 Ok(())
@@ -276,12 +254,14 @@ impl Gpu {
             *slow_ppt = (*slow_ppt).clamp(self.limits.slow_ppt.min, self.limits.slow_ppt.max);
         }
         if let Some(clock_limits) = &mut self.clock_limits {
-            clock_limits.min = clock_limits
-                .min
-                .clamp(self.limits.clock_min.min, self.limits.clock_min.max);
-            clock_limits.max = clock_limits
-                .max
-                .clamp(self.limits.clock_max.min, self.limits.clock_max.max);
+            if let Some(min) = clock_limits.min {
+                clock_limits.min =
+                    Some(min.clamp(self.limits.clock_min.min, self.limits.clock_min.max));
+            }
+            if let Some(max) = clock_limits.max {
+                clock_limits.max =
+                    Some(max.clamp(self.limits.clock_max.min, self.limits.clock_max.max));
+            }
         }
     }
 
diff --git a/backend/src/settings/steam_deck/oc_limits.rs b/backend/src/settings/steam_deck/oc_limits.rs
index 69aa364..74c2bf2 100644
--- a/backend/src/settings/steam_deck/oc_limits.rs
+++ b/backend/src/settings/steam_deck/oc_limits.rs
@@ -1,4 +1,4 @@
-use crate::settings::MinMax;
+use crate::api::RangeLimit as MinMax;
 use serde::{Deserialize, Serialize};
 
 const OC_LIMITS_FILEPATH: &str = "pt_oc.json";