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Guru3D.com » News » Windows 11 is up to 15 percent slower with AMD CPUs, fixes coming in October

Windows 11 is up to 15 percent slower with AMD CPUs, fixes coming in October

by Hilbert Hagedoorn on: 10/07/2021 09:53 AM | source: tweakers | 70 comment(s)
Windows 11 is up to 15 percent slower with AMD CPUs, fixes coming in October

AMD acknowledges that Windows 11 is slower than Windows 10 on suitable AMD processors. This is due to issues with the L3 cache and the processor's thread distribution across cores. Microsoft and AMD are now working on fixes that will be available in October.

The L3 cache's latency is three times that of Windows 10. As a result, AMD cautions that applications that are sensitive to memory subsystem access time variances may operate slower than before. Sensitive applications may operate around three to five percent slower than they should. Certain programs, "such as those frequently used in esports," may perform 10 to 15% slower than they did on the previous OS.

The second issue is with CPPC2, which controls which threads are processed by which cores within the UEFI. With Windows 11, threads would no longer be processed automatically by the processor's fastest core. Performance degradation would be noticeable in particular for programs that rely on a single or a few threads. This issue would be most obvious in processors with eight or more cores and a TDP more than 65W.

While Windows updates are required for the L3 cache, AMD updates can resolve the CPPC2 issue. AMD has stated that both patches would be available in October. Affected users are recommended to continue using Windows 10 until then.

Windows 11 was released on Monday evening. On Tuesday, tweakers provided benchmarks for the new operating system. This already shown that the AMD CPU utilized in certain apps performed slower than the CPU used in Windows 10, although the differences were minimal in other applications.







« Review: Far Cry 6: PC graphics performance benchmark analysis · Windows 11 is up to 15 percent slower with AMD CPUs, fixes coming in October · Gigabyte Z690 Aorus Elite AX DDR4 motherboard with PCIe 5.0 slot and DDR4 »

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kapu
Senior Member



Posts: 5377
Joined: 2006-12-22

#5952868 Posted on: 10/07/2021 02:29 PM
Been saying that for long time.

Boost clocks of mine 5950X suffered with Windows 11 as well as the UI lag is horrendous.

Why would You upgrade ? There isnt any rational reason for upgrade yet . Maybe in a year or two.

mackintosh
Senior Member



Posts: 966
Joined: 2012-11-28

#5952885 Posted on: 10/07/2021 02:54 PM
All my usual games and day-to-day software tasks appear to be performing the same on both my Intel and AMD systems. If there are performance issues, they do not seem to affect my particular workloads. Unfortunately, I did not run any parting W10 benchmarks before migrating to W11.

AlmondMan
Senior Member



Posts: 997
Joined: 2007-09-03

#5952886 Posted on: 10/07/2021 02:54 PM
Why would You upgrade ? There isnt any rational reason for upgrade yet . Maybe in a year or two.

You're asking this on an enthusiast forum :p people here buy 5950Xs and 3090s to run demos and benchmarks and never actually play videogames more demanding than Stardew Valley :p

tunejunky
Senior Member



Posts: 3469
Joined: 2017-08-18

#5952893 Posted on: 10/07/2021 03:07 PM
You're asking this on an enthusiast forum :p people here buy 5950Xs and 3090s to run demos and benchmarks and never actually play videogames more demanding than Stardew Valley :p



mic drop

JamesSneed
Senior Member



Posts: 1680
Joined: 2017-02-14

#5952897 Posted on: 10/07/2021 03:22 PM
You would have to be mad to switch to Windows 11 so quickly when Windows 10 is one of the better MS releases like Windows 7, XP , Dos 6.22 etc and not Vista or Windows ME.


Yeah I'm thinking mid to late next year before I upgrade. I have a Ryzen 5800x build that is completely compatible but I just don't feel the need to be apart of this open beta.

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