Random FPS drop

PsychoGamingLemon

Honorable
Sep 23, 2013
647
0
11,160
Hi guys,

My mate's pc has randomly dropped fps in any game he plays. He went from about decent to 10 fps on just cause... it's done this for all his games and it's constant.
I've looked at it, all the fans work and the PSU is fine.

He has a Intel Pentium, 4gb ram and a HD 7750

Any suggestions?

Thanks