Computer stuttering when launching programs/games

[Loque]

This has been happening ever since I moved over to Ryzen last year, but for some reason, whenever I load up certain games/programs, my computer will suddenly start stuttering/lagging. Mouse movement will be extremely laggy and will continue to move after I take my hand off my mouse as if it's "catching up"
Sound is extremely choppy and the program/game will take like 4 times longer to load...

Certain games do this EVERY time I launch them (Unreal Tournament) Other games/programs will only do this the first time I launch them, and subsequent launches seem fine (still loaded into memory?)

Anybody encountered this? What's going on?

 

[Loque]

nobody have any ideas whats going on?

 

[Loque]

Reinstalled yes. I tried moving an offending game to 3 different drives (1 sata and 2 m.2) and it made no difference. It would do the same thing every time. As for memory, I've been through 3 different kits since moving over to Ryzen last year and encountered this issue with all 3