From 40c1eeae3100c9ec935fe8493fe3a8332d370fcb Mon Sep 17 00:00:00 2001 From: NGnius Date: Mon, 30 Oct 2023 20:32:48 +0000 Subject: [PATCH] Update 'FAQ' --- FAQ.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/FAQ.md b/FAQ.md index 66f45fc..3c63939 100644 --- a/FAQ.md +++ b/FAQ.md @@ -44,7 +44,7 @@ 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. There is a bug before SteamOS 3.5 which caused cache issues when SMT was enabled, but there have been reports of some games still benefiting from SMT being disabled on SteamOS 3.5+ too. +I don't really know. There is a bug before SteamOS 3.5 which causes cache issues when SMT was enabled, but there have been reports of some games still benefiting from SMT being disabled on SteamOS 3.5+ too. 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.