So 2 weeks ago I bought a new video card(gtx 660 oc'ed) and a psu(inland 600watt) to upgrade my pc which had bad integrated graphics. It ran fine for 2 weeks until yesterday. I was playing League of legends and my music and monitor shut off. When I tried starting the computer up again, all the fans got really loud and the power button didnt light up and it didnt boot up. Thinking it overheated, I left it overnight. In the morning I tried again but it still didnt work. So I opened up my case and got some dust out and move some wires around. The pc now booted up and worked. After about a hour of working fine it shut off again. The desktop still runs and the power is still on, but im forced to turn it off. It boots normally now, but it keeps shutting off randomly every few minutes to a hour. No idea what to do, any help is appreciated