Got it together. The bios didn't need flashing, as it came with F5.
I'm wondering though, about the gtx 470's heat. Speedfan shows it at 89C at idle, and the 8800GT at 73C. ( BTW, I'm running 4 monitors, and have read that when you connect 2 monitors to one card, that card then runs full tilt, and never at idle). True?
The way the cards are installed is that the 470 is in the top pci-e slot and the 8800 underneath, but there is only about a half inch space between them. Was thinking of moving the 470 to the bottom pci-e slot and that would provide more space between the cards, although the 470 would be about an inch and a half above the psu, which also generates heat.
Any thoughts?