I just got a used xfi xtremegamer card today. Physically uninstalled my audigy 2 card, then uninstalled all the drivers for it. When I tried to install the drivers for the xfi card in windows(win 7 x64), it got so for and then blue screened on me. Fair enough, I rebooted and tried uninstalling/reinstalling again. This time I got a BSOD and then windows failed to start past the opening splash screen. I restarted the system again and things got a little weirder. The POST screen hung and was visually corrupted on my monitor. Restarted again. I got into windows and BSOD'ed. I tried multiple versions of the official xfi drivers, I even uninstalled the little bits and pieces of nonplug and play drivers from the hidden driver menu in device manager. Nothing could keep the system stable. Regardless I cant imagine anything other than hardware failure causing a failed POST. Short question to a long post: Has anyone encountered a similar issue with running the hardware at right with a xfi card? I am just trying to cover my bases before sending the card back for a return.