Just setup a new PC (I had some help because I barely know what I'm doing but they had to leave and now I'm stuck) and having trouble getting the GTX 570s working. The mobo PCI-E cables are 12 pins at one end split off to a pair of 6+2 pin ends. The 570s are 6+8 pin. My power supply (AX-850) only has room for one PCI-E cable. There are pins free but the PCI-E cable won't fit into them. I've tried with just the one 570 but I get a blank screen. I had to disconnect the PCI-E cable just to get the onboard GPU going. I don't have a manual and Asus don't have one on their website.