Wednesday, October 6th 2021
AMD Processors Lose 15% Gaming Performance with Windows 11, L3 Cache Latency Tripled
Apparently, AMD processors officially compatible with Windows 11, exhibit a three-times increase in L3 cache latency with the new operating system. The new operating system is also found to break the "preferred cores" system on AMD processors (UEFI CPPC2), in which the two "best" CPU cores, which can sustain the highest boost frequencies, are highlighted to the operating system, so most of the light-threaded traffic could be sent to them.
AMD and Microsoft jointly made this discovery, and listed out potential impact on application performance. The increased L3 cache latency affects performance of applications sensitive to memory performance. They also warn of a 10-15% loss in gaming performance. On the other hand, a dysfunctional "preferred cores" system would mean reduced performance in light-threaded tasks as the OS is unaware which are the processor's two best cores. Thankfully, both issues can be fixed via software updates, and AMD is working with Microsoft to push fixes for both issues through Windows Update, in an update rollout scheduled within October 2021.
Source:
AMD
AMD and Microsoft jointly made this discovery, and listed out potential impact on application performance. The increased L3 cache latency affects performance of applications sensitive to memory performance. They also warn of a 10-15% loss in gaming performance. On the other hand, a dysfunctional "preferred cores" system would mean reduced performance in light-threaded tasks as the OS is unaware which are the processor's two best cores. Thankfully, both issues can be fixed via software updates, and AMD is working with Microsoft to push fixes for both issues through Windows Update, in an update rollout scheduled within October 2021.
141 Comments on AMD Processors Lose 15% Gaming Performance with Windows 11, L3 Cache Latency Tripled
And it had been Dev-builds exclusive bug until now
I can't name anything about it that I actually like.
At least with previous generations of Windows there were upsides and downsides to the interface changes but I'm really struggling to see any meaningful benefits to Windows 11's new interface. It's just worse no matter which metric you're judging it by.
Yeah ms pretty much insures people will use open shell/ .... to redo the new interface it's so bad.
Bad thing is updates will kill any third party workaround over and over.
Anyway, this is fixed in the latest dev channel build so I'm gonna wait until it's pushed to release.
Went back from Arch Linux to Windows 11 and I gotta say it does feel nice to have all my shit just work.
The more things change, the more they stay the same !
Big business at its best once again ! So typical !
Hopefully this is sorted very quickly, or is Windows11 really only built for Intel ?You make a very good point, sounds extremely convenient timing ! Couldnt have planned it any better if you rigged it ... whats that ....?
@R-T-B is the dev build worth a go?
I mean, nobody is perfect but does this mean that they should be THAT sloppy? Sadly, yes. And the root cause is that apart from a few (relative to numbers in the entire user base) geeks in the forums, Joe and Jane have zero clue what a cache is, let alone what $L3 is, or God forbid - that it's botched by M$. Regular folks are force fed whatever dung-ridden software M$ decide to, sadly not too tech-savvy to realize it.
Honestly I'm dumbfounded that they didn't just include it.
Or is it purposefully built for Alder Lake ?
But I'm no developer!
I think it is safe to say Microsoft has Intel as a priority by virtue of being a larger vendor alone. Still dumb, but at least makes some amount of sense fron a purely selfish corperate standpoint.