Hello i just bought a i7-3770s quad on 3.1ghz, asrock b75 pro3 motherboard, 4gb ram 1600mhz, 5400rpm 500gb hard + gtx650 2gb ti video, 650w. Everything started after i installed windows, after i log in my profile few mins later my pc shut itself down. Then i thought i try without the videocard and it worked ok with the onboard Intel® HD Graphics 4000 card. After that i installed Diablo3 to try and test the pc. Its frame rate was really bad so i thought if i use another 650w supply maybe things will be different. At first it was it worked 10 min but the d3 was still running poorly and after 10 min it shut itself down again. I currently use the pc without the video on friday i get new power supply with 750w. I hope that fixes the problem with pc shutting off but the thing that is strange for me is that a friend of mine played diablo3 on his i5 3rd gen and onboard video without much problems and i get really bad framerates even on WarCraft3 and that is a 10 years old game. What could be the issue i have no clue. I really hope the powersupply fixes all the problems because i can't afford much more than what i have already did spend.