Games keep crashing!!!! Help!!!!!!!!!!!!!!!

[gevo]

My games crash, mostly my battlefield 3 game in a matter of seconds. Some games lose fps and stop working gives me a popup on my task bar that there was a problem. I tested my memory but it passed the tests on memtest86. I've done everything, but nothing works. I'm thinking its my gpu. I have warranty on it, however, I'm trying to do process of elimination. Everything works fine till I play a game.
-gtx660sc
-intel 520 180gb ssd
-windows 7 64 bit
-intel i7 930
-620watt corsair hx
-ddr3 patrot 8gb ram
-evga x58 3way sli mobo

 

[C12Friedman]

It could be the graphics card but I'm going to suggest the PSU as your likely issue here. Although it is a well rated PSU, there is always a risk of getting a faulty one (happens even with the best of products). If you have another PSU to try, I would suggest that. I have read that Corsair is rather good about RMA's on their PSU's (for what that's worth).