gtx 660 random artifact's

harinoorvirk28

Honorable
Mar 23, 2013
239
0
10,690
hi guys so i have a gtx 660 with a amd fx 6300 and a corsair cx500 so my pc was running fine for the last 6 months or so.until yesterday i clicked the power button and when it came to the windows loading it started having artifacts squares all over the screen then they went away and when it came to the locked screen they came back then went away again.......BUT then i ran the windows rating test and the drivers crashed and everytime i do some stress testing it always happens :( any advice is my psu up? or my memory? plz help