It seems my test system is affected by that bug, too. So I uninstalled the AMD PPM provisioning driver, hoping for a remedy—no luck. Next, I uninstalled all AMD drivers, and reset the Windows power scheme—no difference. Among other things, I also tried copying the power plan from a fresh OS install to my test system, no go.
Ultimately I decided to reinstall Windows, which takes a few hours, because I also need to setup all my apps and games.
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Specifically with X3D I ran into another issue. After swapping from the 7950X3D to the 7800X3D I assumed that it would just work after installing the new chipset drivers. Nope.. while benchmarks like Cinebench showed the proper numbers, games were running slower than expected. Not "stutter" slow, still very fast, but "only" at levels comparable to the 7950X3D—the 7800X3D must be faster though. After some digging I found out that several CPU cores get parked during gaming, for no apparent reason.
Uninstalling the AMD chipset drivers, reinstalling the newest ones, resetting power settings, copying the power plan from another PC all made no difference—I was missing around 10% in gaming performance. In their reviewer's guide AMD recommends to start with a fresh Windows installation when switching from the 7950X3D to the 7900X3D: ".. may encounter low scores when switching directly from the 7950X3D to the 7800X3D without reinstalling a fresh version of Windows OS. This is likely a result of the AMD PPM provisioning file driver still being applied to the 7800X3D processor, which was not its intended use.
This performance issue is not a typical end user scenario and is only a result of switching CPUs without installing a fresh version of Windows OS." So I invested a few hours to reinstall Windows and set up my benchmarks, and oh surprise, performance numbers were in-line with expectations.
While I can understand that such things might happen, especially with a new release, it's completely unacceptable to ship a driver package that can't be fully uninstalled or that changes the OS in a permanent way, so that a fresh installation is required. I hope AMD can figure out what's going on and that they will provide updated drivers and proper guidance how to detect and fix the problem.