Hi, ive searched around a lot and only found topics talking about the AGP PM (which the x800xt sounds like its the best card) but iam looking for the best card for the Quad 2.5 DC DP. will the mac pro's x1900xt 512mb work in this box? or not? ive got an old Nvidia 7900 GTX here that i retired a few years back. Is that possible to flash to use in my Quad? The quad currently has a Nvidia 6600 in it so ill be looking to upgrade that. also, can someone point me to the Mac roms for the better cards for flashing from PC to mac. That would be great. Ive got an older NV silencer also hanging around from an old gpu fan swap, so thats available for the upgrade aswell. Please advise.