Again, this thread is very difficult to ensure that troubleshooting has been done effectively.
RAM has still not been ruled out. You tried one channel and it worked ok. What happened after that?
Why was it stable for weeks at a time and suddenly isnt? The computer shouldnt have 'reinstalled' USB drivers off a cpu change.
There is A LOT going on in this thread, and from our feedback to yours back to us, it is not being done congruently.
It was stable for weeks with the 3600. After moved the ram to slot 2 and 4 and realize that f4 was closing the game, it's been great.
Not sure why when replaced the 3600 with the 5800 that it redetected most system devices like USB, I did notice the same after putting the 3600 back in after the 5800 without reinstalling Windows.
So far though, after installing the 5800x again and reinstalling windows it "seems" to be pretty stable. I can play a game, exit it, and launch another without issue.
Only concern at the moment is the 5800 is running hotter than I'd like.