They've got replacement heatsink fans for video cards.
The fan on my graphics card is not working. The card is an Nvidia 3DForce FX5700, 256Mb, AGP slot. There is not a power supply cable attached, and I wonder if this would be the problem. The card functions but overheats and shuts down during games, etc. There is not a normal 4-pin connection on the card, but there is a different 10-pin connection that might be for something. I'm not sure that the power supply even needs to be connected, its just an idea. Could the fan itself be bad, or could it be a power supply issue, or what?