I have a good PC but it's running slow

[jaydenjd98]

So, I recently built a PC with pretty good specs. But it's running all of my games slow. Even Gmod which should be easy. It's just choppy and borderline unplayable. Any suggestions on how to fix this problem?
I have:
MSI Geforce gtx 1080 (not OC)
Ryzen 7 1700x (not OC)
16 GB RAM

 

[jaydenjd98]

I just cleared disk space and it seems to be fine at the moment.