I have this motherboard, but it's defective & have been meaning to get rid of it for the last 5-6 years (!) but never got around to it.
So I'll see if the fan still works, & if yes you can have it for free. This particular motherboard doesn't have internal graphics/video by the way. The fan (if present) is there to cool your Northbridge chip.
Unless you have the model number wrong?
Gigabyte GA-7N400 PRO specs click here. By the way, Rev 2.x version of this board did away with the fan & replaced it with a passive heatsink - you can see this in the link. G