Hello, every time I try to play a game at high res it will freeze after 5 minutes and crash.This happens with all my games sadly,I have an I5 3570 and I recently bought a R9 280 X sapphire.I've tried updating the drivers, changing the ram,downclocking, reinstalled windows 8 to no avail.I bought a new PSU and still nothing.I seriously don't know what else to try.I thought it was a graphics issue but I'm not so sure now.when my games freeze the CPu shows a 100 % load.So I suppose it's a CPU issue.