I bought a custom computer with three 8800 Ultras about a year ago but unfortunately only two of the cards now appear in the Device Manager:
I was just wondering if anybody could help me figure out why one of the cards isn't appearing? The specs of the machine are as follows:
1 x Hauppauge WinTV-HVR-1100 MCE HVR
1 x SONY-NEC Optiarc AD-7173A 18x DVDRW Black OEM
1 x 750Gb Samsung SpinPoint F1 HD753LJ 7200 32mb Cache SATA II
2 x 32Gb Samsung 2.5" ATA SSD Drive with SATA converter
3 x BFG Nvidia 8800 Ultra OC 768Mb PCIe HDCP
1 x OCZ DDR2-1000 2x2048MB ReaperX 4GB Dual Channel Kit
1 x Intel Core 2 Quad Q6600 Retail (4x2.40GHz 1066FSB 8Mb) 95W
1 x Asus P5N-T Deluxe 780i SLI (nVidia 780i - 1333 FSB Penryn)
1 x Enermax Galaxy Modular DXX 1000W PSU
1 x LiquoCool Antarctic TX (CPU+Chipset+2VGA)
1 x Lian-Li V2100B Plus Black CASE (NO PSU)
1 x Windows Vista Ultimate 64 bit DVD OEM
1 x Safe Stable Overclocking (5-40% - CPU/VGA)
1 x extra 3rd graphics cooling
1 x chipset not cooled
I understand the motherboard possibly isn't the best choice, and would look into changing it if this was recommended. I can provide more photos/details if that would help.
Uninstall all the nvidia drivers, thats GPU and chipset. Make sure you have the new ones to be installed sitting on the desktop or what not, because uninstalling the chipset drivers will warrant no internet.
It was a physical connection issue I think. The cables were so tight between the graphics cards and the PSU it must have been breaking the connection. I re-reouted them so there's more slack and all three cards are working now..