Hi people, this is my first post so sorry if I fail to post necessary information. Anyways, I have EVGA 2 GTX 560Ti SCs. I have overclock them to 990mhz core and 2190mhz memory which I think is the same as 1145mhz. I can run 3dmark11 stably but when I try battlefield 3, after about a minute or 2, I get a black screen. No BSOD or any of that stuff. I cannot do alt tab, ctrl alt delete or any of that. I have tried bumping up the voltage to I believe 1.82 or was it 1.082? Any ideas?