Hey everyone, i recently upgraded my gpu in my pc. gt 610 1gb to gtx 550ti 1gb. I play games like, bf3, black ops2, and chivalry medieval warfare. After I put in the gpu and turned it on, i updated the drivers and everything. I tried testing out bf3 first, the game would play for about 3-5min before my pc randomly shuts off. It happened with all the other games too. I checked my temperatures for my gpu while gaming, i get 60-70 degress Celcius. And im pretty sure that is normal for gaming. CAN SOMEONE HELP ME PLEASE. I REALLY WANT TO START GAMING NOW. If there is anything else you need to know just tell me in the forum. Thank you very much.