Wondering if anyone here has dealt with XFX for a warranty replacement. I bought a used 6870 a couple months ago and it seems to be toast with black lines, split screen, artifacts, and then an OS crash...in games and in windows explorer. Did all the usual troubleshooting and everything points to a defective card. Anyway it's one of the double lifetime warranty cards, the last owner registered it, then I registered it for the second warranty. It's been three days now with an open service ticket and I'm beggining to think there is going to be a run around trying to get a replacement. If I do get a replacement, will it be another 6870 or a "comparable" card they currently offer?