• Motherboard not giving gpu fan power?
    9 replies, posted
So I acquired an apparently non-functioning computer so I ripped it apart and found out the only issue was the gpu burnt out because its fan wasn't working, I just figured that the gpu was to blame and that the fan had died simply because of its age, however when I threw in a new gpu, everything booted up and worked correctly, but the new gpus fan wasn't spinning either? I threw the new gpu into a different computer to make sure that its fan worked and sure enough, it works fine. So what's up? I suspect it has something to do with this motherboard but all research I'm doing is saying "oh yeah your gpu fan is broken" when it really isn't. I want to clarify that everything works perfectly fine except the gpu fans do not spin, however I have no idea why. I've restored all bios fan settings so that shouldn't be the issue.
The PSU in the older computer might not be sufficiently powerful for your graphics card. What card is it and what is the reported wattage of the PSU?
It's not the psu unfortunately, I've already switched out the old one for a spare I had that's got enough power for it.
What video card is it? What motherboard is it (if you know)? Motherboards do need to supply power to the GPU - even though most need extra power straight from the PSU, they do draw up to 75W through the PCIe slot. It's possible the motherboard can't supply that power, either because it wasn't designed to or because it's broken or because there's an extra connector on the motherboard that needs to be hooked up (you mostly see this on big E-ATX systems).
So the motherboard is from an old Gateway GT5628, and the video card I'm using now is a leftover AMD HD 4650, however the original video card in the computer had the exact same problem and that killed it. I don't remember exactly what the original video card was but having enough power isn't the issue here.
That's a pretty low-power card (48W), so I doubt the fans will be the first thing to fail from lack of power. Seems most likely to be a software issue of some sort, which is unfortunately hard to help with over the net.
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[QUOTE=MrTwicks;47071252]drivers drivers drivers[/QUOTE] Won't help him. You could always hotwire the fan directly to the computers PSU if you can solder worth a damn. They're usually 5 volts iirc. Only issue would be the fan is always going full tilt.
Does the PCIe version of the 4650 have a power connector (and I mean the one specifically)? I know the AGP version does, but that's because AGP can't supply as much power from the slot. Odd though. Wiring the fan to the PSU should be easy though. And should be easy if its just two wires to a header on the GPU.
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