the bottom pci express will load with no problems, then i switch back to the top one red screen again, yes i did unistall all drivers and reinstall
yeah its probably because the bottom one is a pci express x16 slot and the top one is a 8x. So your gpu is not transferring enough bandwidth from the motherboard. Or its simply a motherboard issue unless your gtx 570 was running fine on the top. Also another explanation might be gtx 670 requires pci express 2.1 slot maybe the top one isn't.