I have a Geforce 7950 GX2 Graphics card that won't display in a Dell Dimension 4700.
The Dell will display an Geforce 8800GT graphics card. And when i put the 7950 GX2 into another computer, it works fine.
You can hear the graphics card running and whatnot. The fans spinning and all. But the only way to get video is to connect the monitor to the integrated gpu that the dell has. I've gone through the bios and there is no setting to set it to PCI-E only, only one to set it ton the integrated and auto, it's set to auto obviously.
The card is in fully, that i can asure you. I made sure that it's not touching any of the connectors or anything like that too. Not sure what could be the problem.
I've had that happen on an SLi rig where it would run fine with one card but with two the fans would spin up but no picture, I applied one meatier Corsair flavoured PSU to problem and it ran like a champ.
I'm not sure what the wattage is on that power supply, the computer's psu that i tested it in though have these specs:
Maximum Power 500W
Main Connector 20+4Pin
+12V Rails 3
PCI-Express Connector 2 x 6-Pin
Power Good Signal 100-500ms
Hold-up Time 20ms at full load
Efficiency Up to 85%
115V - Full load 76%; Typical load 82%, Light load 77.9%
230V - Full load 80%; Typical load 85%, Light load 79.45%
Over Voltage Protection +5V trip point < +6.5V
+3.3V trip point < +4.1V
+12V trip point < +14.3V
Input Voltage 100Vac to 240Vac +/- 10%
Input Frequency Range 47 - 63 Hz
Input Current 9A @ 115V, 4.5A @ 230V
Output +3.3V@23A, +5V@17A, +12V1@17A, +12V2@17A, +12V3@17A, -12V@0.8A, +5VSB@2.5A
MTBF >80,000 Hours
Approvals UL, CUL, TUV, CE, FCC, CCC, CB, C-tick
This does not sound like PSU problem to me, since it can run the 8800GT just fine. It actually might be a driver problem.
By the way, you can't set the PCI-E card to run in 2.0 or 1.0. If you have a PCI 2.0-E slot and you have a PCI 1.0 card, the motherboard chipset will automaticaly be compatible with the video card. In other words, you can down grade and use low bandwidth video cards in high bandwidth video card slots, but generally not vice versa.
Bump. I'm having the same issue but my card is an NVIDIA 9600 GSO on a built-it-yourself PC. I'm running with a 600W Ultra PSU which is carrying 32A and 384W on the +12V rail. I also only have 2GB RAM, which I'm wondering if that's the issue. I'm about to test and see. Any more info out there that might be helpful?
Update: After about 10 minutes of nothing on the screen, WIndows finally welcomed me and gave me a pop-up saying basically "update your driver" which is what I was trying to do all along. So it's installing now, I'll update again when I know something else.