Ok, so I bought this card slightly used and was told it had been tested and was working just fine. When I get the card I installed it and right away it started artifacting. White dashes all over the screen. During POST, at the Windows splash screen, you name it. I sent the card off to ASUS for RMA repair. After a week I got the card back, installed it, and STILL! SAME THING! No idea what's wrong. It's installed on a Crosshair V Formula board and is being powered by a Corsair AX 850. Initially the only power I had plugged into the board was the 24 pin and 8 pin auxilary. Now I have ALL the auxilary power connectors plugged in. 8, 4, and molex. STILL NOTHING. What am I missing? PLEASE HELP!!!