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HyperThreading single core issue
Posted: 18 Jan 2025, 17:59
by Slender
Single core perfomance dramatically decrese when HT on + disable cpu idle state in os.
results:
cpu-z enable idle - 900 point
cpu-z disable idle - 770 point
cb 24 enable idle - 129 pts
cb 24 disable idle - 101 pts
When HT off, disable / enable idle not affect on single core perfomance.
this behavior occurs both on 13700kf and 8700k cpu (z370 z790).
someone can test it on amd?
Re: HyperThreading single core issue
Posted: 18 Jan 2025, 18:00
by Slender
Code: Select all
powercfg.exe /setacvalueindex SCHEME_CURRENT SUB_PROCESSOR IdleDisable 0
powercfg.exe /setactive SCHEME_CURRENT
Code: Select all
powercfg.exe /setacvalueindex SCHEME_CURRENT SUB_PROCESSOR IdleDisable 1
powercfg.exe /setactive SCHEME_CURRENT
Re: HyperThreading single core issue
Posted: 19 Jan 2025, 05:11
by JimCarry
Hi i can confirm on amd cpu, when you disable hyperthreading in bios / cmd you gain fps in cs2.i did benchmarks before and after.
Re: HyperThreading single core issue
Posted: 19 Jan 2025, 05:43
by Slender
JimCarry wrote: ↑19 Jan 2025, 05:11
Hi i can confirm on amd cpu, when you disable hyperthreading in bios / cmd you gain fps in cs2.i did benchmarks before and after.
yes, it always gain ~ 100fps when HT off, but that issue is how disable idle affect on single core perfomance when HT on.
Re: HyperThreading single core issue
Posted: 21 Jan 2025, 18:35
by JimCarry
Slender wrote: ↑19 Jan 2025, 05:43
JimCarry wrote: ↑19 Jan 2025, 05:11
Hi i can confirm on amd cpu, when you disable hyperthreading in bios / cmd you gain fps in cs2.i did benchmarks before and after.
yes, it always gain ~ 100fps when HT off, but that issue is how disable idle affect on single core perfomance when HT on.
I have stock cooler so i dont use disable idle,but i think it depends if you have stock cooler like me i think its better to not use disabled idle and the other way around.
Re: HyperThreading single core issue
Posted: 21 Jan 2025, 18:39
by Slender
JimCarry wrote: ↑21 Jan 2025, 18:35
Slender wrote: ↑19 Jan 2025, 05:43
JimCarry wrote: ↑19 Jan 2025, 05:11
Hi i can confirm on amd cpu, when you disable hyperthreading in bios / cmd you gain fps in cs2.i did benchmarks before and after.
yes, it always gain ~ 100fps when HT off, but that issue is how disable idle affect on single core perfomance when HT on.
I have stock cooler so i dont use disable idle,but i think it depends if you have stock cooler like me i think its better to not use disabled idle and the other way around.
no, i have 420 aio.
what cpu you have?
Re: HyperThreading single core issue
Posted: 21 Jan 2025, 18:41
by JimCarry
Slender wrote: ↑21 Jan 2025, 18:39
JimCarry wrote: ↑21 Jan 2025, 18:35
Slender wrote: ↑19 Jan 2025, 05:43
JimCarry wrote: ↑19 Jan 2025, 05:11
Hi i can confirm on amd cpu, when you disable hyperthreading in bios / cmd you gain fps in cs2.i did benchmarks before and after.
yes, it always gain ~ 100fps when HT off, but that issue is how disable idle affect on single core perfomance when HT on.
I have stock cooler so i dont use disable idle,but i think it depends if you have stock cooler like me i think its better to not use disabled idle and the other way around.
no, i have 420 aio.
what cpu you have?
ryzen 5 7600x
Re: HyperThreading single core issue
Posted: 21 Jan 2025, 18:45
by Slender
JimCarry wrote: ↑21 Jan 2025, 18:41
Slender wrote: ↑21 Jan 2025, 18:39
JimCarry wrote: ↑21 Jan 2025, 18:35
Slender wrote: ↑19 Jan 2025, 05:43
yes, it always gain ~ 100fps when HT off, but that issue is how disable idle affect on single core perfomance when HT on.
I have stock cooler so i dont use disable idle,but i think it depends if you have stock cooler like me i think its better to not use disabled idle and the other way around.
no, i have 420 aio.
what cpu you have?
ryzen 5 7600x
when im disable ht, disable / enable idle not affect on singe core perfomance.
can you just try cpu-z test?
Re: HyperThreading single core issue
Posted: 21 Jan 2025, 18:50
by JimCarry
Slender wrote: ↑21 Jan 2025, 18:45
JimCarry wrote: ↑21 Jan 2025, 18:41
Slender wrote: ↑21 Jan 2025, 18:39
JimCarry wrote: ↑21 Jan 2025, 18:35
I have stock cooler so i dont use disable idle,but i think it depends if you have stock cooler like me i think its better to not use disabled idle and the other way around.
no, i have 420 aio.
what cpu you have?
ryzen 5 7600x
when im disable ht, disable / enable idle not affect on singe core perfomance.
can you just try cpu-z test?
when im disable ht, disable / enable idle not affect on singe core perfomance.
i can cofirm that on my old intel cpu with cpu benchmakrs. no change in fps.
can you just try cpu-z test?
how to do it ?
Re: HyperThreading single core issue
Posted: 21 Jan 2025, 18:54
by Slender
JimCarry wrote: ↑21 Jan 2025, 18:50
Slender wrote: ↑21 Jan 2025, 18:45
JimCarry wrote: ↑21 Jan 2025, 18:41
Slender wrote: ↑21 Jan 2025, 18:39
no, i have 420 aio.
what cpu you have?
ryzen 5 7600x
when im disable ht, disable / enable idle not affect on singe core perfomance.
can you just try cpu-z test?
when im disable ht, disable / enable idle not affect on singe core perfomance.
i can cofirm that on my old intel cpu with cpu benchmakrs. no change in fps.
can you just try cpu-z test?
how to do it ?
enable SMT in bios.
run that script:
Code: Select all
powercfg.exe /setacvalueindex SCHEME_CURRENT SUB_PROCESSOR IdleDisable 1
powercfg.exe /setactive SCHEME_CURRENT
go to cpu-z and make benchmark test
next apply that script:
Code: Select all
powercfg.exe /setacvalueindex SCHEME_CURRENT SUB_PROCESSOR IdleDisable 0
powercfg.exe /setactive SCHEME_CURRENT
and remake bench.