New Windows 11 24H2 have big multicore performance loss compared to 23H2 with Z790 and 13900KS

[arlicht]

Does anyone tried Geekbench 5 and Geekbench 6 in Windows 11 23H2 and 24H2? For me I see kinda big loss in multithread performance in new Win 11 24H2. Same BIOS, same settings, same drivers etc.. After 24H2 update performance is decreased.. Maybe somebody could check this too if you have similar decrease and loss in CPU performance on Z790/Z690 with Raptor Lake?

 

 

  

[achugh]

Hi @arlicht are you using the latest 12B microcode for this test? It seems most performance loss is in the multi-core side. With latest ASUS BIOS forcing C1E the cores are not going to run at full speed all the time so this performance loss is going to be expected specially in multi-core unless ASUS team works out with Intel and together they decide not to for C1 lower power states to be enabled all the time.

[arlicht]

No, I use 2503 BIOS with 129 microcode andwindows high performance power plan. 24H2 is worse in CPU performance. Even CPU-Z is hitting around 17400 points and on 23H2 it is 17700 points. 

[Wesley1]

Do you maybe run HWiNFO64 in the background?

I observed it kinda affect CPU-Z multithreading score, by few percent.

[arlicht]

No, I did not run anything in the background and I know that HWinfo use resources thats why I bench without it. As I already told - its just 24H2 have degraded performance for me. If you can test and compare 23H2 and 24H2 with identical settings and config - I would like to know your results. Thanks.

[Wesley1]

No, I'm still on Windows 10. 

I heard 24H2 for Windows 11 had a lot of problems and was deployed and then rolled back a few times.

Now I recall 24H2 reworks CPU scheduler to better support AMD processors, maybe they broke something for Intel. Or thought the performance drop is not that relevant.

[xilamx]

I have the same problem on windows 11 23h2 I managed to get 23.600 points in 3dmark time spy, and in 24h2 I get 20.800 points in the cpu score, I also noticed a decrease in the cpu z score from 15,400 points in 23h2 to 14,700 points in 24h2. I have a z790 msi with the msi extreme profile and microcode 0x129.

[arlicht]

Thank you for your reply.

Could you please go to my Microsoft Feedback Hub created problem report and upvote and comment there too, so this problem could have more attention there too?

Link:

https://aka.ms/AAsoifm

Thank you.

[Billybigun]

HI,

After many hours of testing I managed to update to Windows 11 24H2 26100.1742 (the initial public release) with no CPU issue (14900KF), using the following install order:

Download Win 11 24H2 26100.1150 from here:

category:w11-24h2 - Browse known builds - UUP dump

1) Install or upgrade to Win 11 24H2 26100.1150 with no internet connected.
2) Pause all Windows update for now until a future fix that hopefully will be released sometime.
3) Install kb5041571 (Win 11 26100.1457)
4) Install kb5041865 (Win 11 26100.1591)
5) Install kb5043080 (Win 11 26100.1742)

6) Reboot and then connect the internet.

Any update after these cause the CPU issue again so keep the updates paused for now.

What this method does is bypass the install of kb5044030 which causes the CPU issue.

If you already have kb5044030 installed - uninstalling it does not fix the CPU issue !!

Regards

[Billybigun]

Hi,

I can confirm the fix at the link below works OK after applying and rebooting on Windows 11 24H2 2161 (Latest)

https://www.overclock.net/threads/24h2-cpu-score-drop-in-benchmarks-specifically-timespy-potential-f...