Maybe AMD is too advanced, maybe Microsoft Windows 10 is too lagging… The Thread Tearer 3990X processor sparked widespread discussion when it went on sale, mostly related to the 64-core 128-thread luxury parameter it brings to desktop users. Embarrassingly, however, both Windows 10 Home and Pro recognize only 64 physical or logical cores (threads).
Although Windows 10 Pro claims to be able to handle 128 threads, in Task Manager, the lit 3990X is actually identified as two 64-threaded processors, i.e. a single 128 thread becomes a two-way 64 thread.
This is not a good thing, as the Pro version is not optimized for moving 128 threads at the same time.
The test shows that the performance of the 3990X has improved after multithreading is disabled in many benchmarks.
There may have been a lot of user feedback, and Microsoft is said to have deployed an emergency update for Windows 10 Pro this week to correctly identify the single 128 thread.