If you have a Windows 10 PC with a modern AMD CPU that officially supports Windows 11 and consider moving to the newest operating system, you might need to delay the upgrade. According to numerous reports from early adopters, AMD-based systems experience noticeable performance dips after upgrading to Windows 11. And that is not just yet another exaggerated "report" from websites seeking clicks. On its official support website, AMD has officially confirmed problems users might encounter after installing Windows 11.
According to a post on the AMD support website, computers with AMD CPUs that officially support Windows 11 experience significantly increased L3 cache delay. That causes performance issues in memory-sensitive apps and various games (up to 5% in apps and 15% in games, mostly eSports titles).
Increased L3 cache delays are not the only issue AMD users need to beware of. On systems with high-performance CPUs, the system firmware might fail to schedule threads to run on the fastest core. That leads to reduced performance in applications sensitive to single-core performance.
There are currently no possible workarounds to fix the problem. AMD recommends users stick to the current version of Windows 10 until it provides a fix for the problem. AMD says a patch "is expected" to arrive later this month, possibly with the upcoming Patch Tuesday updates.
Windows 11 officially supports AMD processors with the Zen+ architecture and newer (Ryzen 2000 Series and higher). If you plan to upgrade your system, be sure to download Windows 11-optimized chipset and GPU drivers from AMD. Still, even with the newest drivers, you might encounter the previously mentioned issues and performance downgrades. It is probably a good idea to remain on Windows 10 and give Windows 11 more time to mature.
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AMD always has issues with Windows. This is reason enough to go with Intel. For ages, VMware Workstation and Oracle VirtualBox are broken on Windows 11 with Windows Hypervisor Platform and Hyper-V enabled. These two apps are type 2 hypervisors and were updated in Windows 10 to run despite a Type 1 hypervisor being present such as Hyper-V by taking advantage of the WHPX APIs. But now they’re broken on AMD platform on Windows 11 and nobody at Microsoft even bothers to test or fix the issue.