I just obtained the 2nd card to complete my SLI setup. Im running two GTX 580's (PNY XLR8 Enthusiast edition STOCK OVERCLOCK). Any time i try playing Battlefield 3 with this setup or even one 580 for that matter, i get a green square artifact crash. this leads me to believe this is a memory clock issue with both cards being overclocked (since it does not say the cards crash/nvidia recovered from a driver crash or what have you). if anyone can help me sort this out I would really appreciate it.