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+++ b/FAQ.md
@@ -5,9 +5,8 @@ PowerTools does not save any data by default; it reads and writes to the SteamOS
 Since no data is saved, a reboot will reset all PowerTools settings back to default.
 
 ## Why does PowerTools only let me select some values?
-There's a few reasons for this, depending on the values in question:
-- GPU PPT Wattage: The rest of the values can already be set from SteamOS's Performance settings in the QAM
-- Others: logical limits coming from the [specs of the Steam Deck](https://www.steamdeck.com/en/tech)
+There's a few reasons for this, depending on the values in question, but it all stems from limits imposed by (or to protect) the hardware.
+Most limits can be justified by the [specs of the Steam Deck](https://www.steamdeck.com/en/tech) or the allowed values for a specific kernel API.
 
 ## How do I reset to default settings?
 Restart your Steam Deck. Nothing in PowerTools is persistent, unless you enable persistence (in which case: turn off the toggle, *then* restart your Deck).
@@ -16,13 +15,19 @@ Restart your Steam Deck. Nothing in PowerTools is persistent, unless you enable
 I don't know, ask Valve. Most of the defaults are pretty logical, so none of them should be too objectionable.
 
 ## What does disabling SMT do?
-The SMT toggle in PowerTools doesn't actually disable SMT. Instead it disables every second CPU, since every group of two CPUs is one logical CPU core.
+The SMT toggle in PowerTools doesn't technically disable SMT.
+Instead it disables every second CPU, since every group of two CPUs is one logical CPU core.
+
+## Why does disabling SMT speed up some games?
+I don't really know. 
+My theory, which is backed by exactly zero research and experiments, is that since SMT increases performance of a single core by less than 100% (usually it's closer to 30-50%), that 150% performance gets split between two threads, effectively reducing each thread's performance to 75% when both threads are under heavy load.
+It would then follow that disabling one of those threads would restore the remaining thread to 100% performance.
 
 # TLA (Three Letter Acronyms)
 ## AMD
 Advanced Micro Devices: the company that makes the processor in the Steam Deck
 ## APU
-"Accelerated" Processing Unit: the marketing term for a CPU with an integrated GPU
+"Accelerated" Processing Unit: the marketing term used by AMD for a CPU with an integrated GPU
 ## CPU
 Central Processing Unit: the main processor, the Steam Deck uses one with Zen2 architecture
 ## GPU