Hi, today I received the GPU I ordered (a used MSI Radeon HD 7950), and installed it and my old Radeon HD 5850 onto my MSI 890FXA-GD70 motherboard. When I booted up, I got stuck on the 2A error code on the mobo. Since then, I tried switching the positions of the GPUs and using only the 7950. Using only the 7950 stops at 2A again, but using the 7950 as a secondary I was able to boot into Windows once, but before I was able to check if the card was being detected properly, the screens went blank and the system became unresponsive (sadly, it happened while I looked away, so I have no idea what the screens looked like before they went dark...). Subsequent attempts to boot in the same way have gotten through the windows 7 loading thing, but then the screen goes black before it shows the login screen. I am assuming the card is dead (it was used like i said), and I am planning to send it back, but I thought I'd ask around before I paid for the shipping that I may or may not be able to get refunded. Thanks for any help guys!