Some may find this useful, I was getting odd stutter in some games, Spiderman Remastered for example, And it appears Windows 11's virtualisation based security causes various performance issues with the 9800X3D, Something Microsoft needs to fix ASAP.
Tweaks:
1. Go to Windows Security->Virus and Threat Protection->Manage Settings->Turn off Tamper Protection
2. Go to search box and type 'core isolation'. Turn off EVERYTHING and reboot system.
3. Go to BIOS and disable AMD Virtualization stuff. There are 2 things that you need to disable:
a) SVM (This will disable virtualization)
b) IOMMU (This will disable Hyper V crap)
I went from an odd stutter every few seconds in Spiderman Remastered to silky smooth performance.
Just to make sure it wasn't a fluke I re-enabled all of it and sure enough the stutter came back.
Found here -