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
Either way it will be fixed, they'll probably update the Xbox Series kernel to W11 at some point too so obviously they'd need it fixed in that.
I have not noticed it either but I doubt AMD would claim this were it not true.It's not even on in fresh installs, so no.Not to my knowledge. No benchable figures like AMD.
Having said that though, I am looking at a platform upgrade in the next couple months, hardware wise at least.
Is indeed fixed.
All down to scheduler fixes.
Maybe change the headline to: "Windows 11 fix underway for AMD 15% performance loss bug."
I can see it now......terrible, bad, inaccurate reviews will pop up all over the net in amonths time where A is running on 11 but B is not etc etc.
Even if they did, someone should really lose their job for missing stuff like this.But all the verdics will be 'intel takes back the crown', 'intel rullz, amd sucks', etc. Many people will cream their underwear and rush to the stores to get the latest and greatest from intel.
More so, with all the branching, speculative executions and other kinky stuff, the entire system becomes really volatile from users' perspective.
Spot on, bruv!