HyperThreading single core issue

[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?

[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

[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.

[Slender]

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.

[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.

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.

[Slender]

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?

[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.

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

[Slender]

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?

[JimCarry]

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 ?

[Slender]

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.