Games lock up the computer

Hello. I just made a new computer today and everything seems to run fine, but i see one problem.

When i open any game at all, the game locks my computer up. After around 1-2 minutes, no matter what im doing (playing or looking at the menu) it just freezes. I cant get out and i cant do ANYTHING. It just freezes and i have to turn it off the no-no way =(.

http://www.newegg.com/Product/Product.aspx?Item=N82E16813128409
http://www.newegg.com/Product/Product.aspx?Item=N82E16819115213&cm_re=i7-870-_-19-115-213-_-Product
http://www.newegg.com/Product/Product.aspx?Item=N82E16820145260 8GB total
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130550&cm_re=gtx_470-_-14-130-550-_-Product
http://www.newegg.com/Product/Product.aspx?Item=N82E16814150314 for Physx

I have tried Left 4 Dead 2, Medal of Honor (didnt even make it past the menu), and Dead Rising 2.

Im not sure what is causing this exactly, so i just chose "graphics cards" to put it under.
2 answers Last reply
More about games lock computer
  1. Only happened on games, right?
    Have you installed the right driver for your card?
    Checked the card temps?
  2. You need to try a few things possibly run Prime 95 to see if a heavy processor load causes it, try only 1 stick of RAM at a time, try only 1 graphics card at a time. It could also be driver related or the PSU is not strong enough.
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