I have an ASUS A7V-266 mobo and have recently heard a strange grinding noise coming from my pc. Turns out it's coming from the fan on the mobo (I think it's called the northbridge fan) so I took and ...

So I built out a new box some months ago with the help of the fine Ars folks and it's been running great until recently.. for some reason the fans seem to randomly ramp up high for a few seconds then ...