I have "ASUS Crosshair II Formula" motherboard. I bought two "Galaxy GTX 670 Gc 4Gb"for SLi. I put them in PCI slots, but don't work. I flash the CMOS of motherboard, nothig. The computer stay with this image: " NVIDIA GeForce GTX 670 VGA Bios V 4293 Version 80.04.31.00.3F Copyright (C) 1996- 2012 Nvidia COrp." What is this? I also have a new motherboard "ASUS Crosshair V FormulA-Z" which I have not installed it yet. What should I do? I have this cards from U.S. , I'm in Romania now.