AMD Demands Official Fix for Windows 11 Bugs

 

Image Credit: AMD

Update 10/21/21 10 am PT: Microsoft has now released the Windows 11 patch to the general public. This clip contains a second bug fix that causes L3 repository delays and bandwidth issues. That means both necessary adjustments are now available for AMD processors. We have amended the text below and added the appropriate line from the Windows changelog to the end of the title.

AMD also confirmed to Tom's Hardware to release a clip of one of the two bugs that lead to reduced Windows 11 performance and impact on the game's Best CPUs. The first episode from AMD is in the form of a chipset driver that fixes the UEFI CPPC2 driver responsible for directing cables to the correct cores. Naturally, all users on Windows 11 platforms should update to the new episode as soon as possible - you can find a new driver here. The second episode comes from Microsoft as a modern Windows update. As a reminder, the bugs affect all Windows 11-compatible AMD processors.

The first clip fixes AMDI's feature of UEFI CPPC2 (Interoperable Core Power Control 2), also known as 'Preferred core' technology that helps direct low-wire work to high-speed cores on the chip. This distraction mainly affects performance in programs with a simple series. AMD says the reduction in performance may be more noticeable on chips with more than eight cores and a> 65W TDP rating, but the clip released today will fix those problems. We have a changelog list below.

The second episode, released by Microsoft as 22000.282 (KB5006746) Windows 11 update, fixes L3 cache error affecting latency and bandwidth. As you can see from our deep-dive test last week, we found that, prior to repair, AMD's L3 delay could be six times higher for Windows 11 compared to Windows 10. Additionally, L3's bandwidth can be up by 12X. on Windows 10.

AMD claims that the L3 repository bug can reduce game performance by up to 15% on some eSports titles and 3-5% on desktop PC programs, although we have not seen such a negative impact on our game testing. Microsoft initially released the new Windows Update in its Insider system, but it is now available to the general public through the standard update process. Here is a picture of AMD describing both tracts:

The bugs couldn't come at a bad time: Intel is on the verge of launching its powerful Alder Lake chips that will intensify the race for the desktop PC. To make matters worse for AMD, Windows 11 has new schedule settings especially Alder Lake, so reviewers will use the new app to test. That raises concerns that the error may result in incorrect comparisons, especially if the second clip is not timely for reviewers to include in their Alder Lake launch date test. The discovery of both episodes eased the fear.

Both bugs affect the entire Ryzen CPU based on Windows 11. That means all the Zen + CPUs, Zen 2 and Zen 3 include the Ryzen 2000, Ryzen 3000, Ryzen 4000, and Ryzen. 5000 processors. In addition, select AMD EPYC processors for data centers and new Athlon chips are also affected.

As mentioned, we've already shared several performance tests that show the impact of Windows 11 bugs. We'll get back to the updated review soon.

Here are the AMD and Microsoft changes to the appropriate updates:

AMD Chipset Version 3.10.08.506 Changelog:

        1. AMD Chipset drivers

        2. AMD Ryzen ™ Power Plans (required to support UEFI CPPC2 with “Zen +” and “Zen 2” on Windows® 11)

        3. AMD Ryzen ™ Power Provisioning Package (required to support UEFI CPPC2 with “Zen 3” and later in Windows 11)

Microsoft Windows 11 22000.282 patch (KB0006746) Changelog:

It deals with L3 temporary storage issues that may affect the performance of other applications on devices with AMD Ryzen processors after upgrading to Windows 11 (actual release).