My W2K PC (Asus A7N8X) has a fan that sounds a bit like a motor-boat until Windows starts to Load, then the noise just disappears to a normal fan noise. Presumably some sort of speed controller is brought into action at this point.
Does anyone know why this is, and if it is possible to possible to silence the motro-boat?
I thought that at first woodchip, but I don't beleive its the cold, it does it if I shut the PC down, then immediately power it up again, so it would be nice and warm at that time.
And it goes "quiet" just about the same time as the Windows GUI is loading, which makes me think something is grabbing control of the fan. I think it's too much of a coincidence for the bearings to stop rattling at the same time every boot-up.
The fan on my Advent winds up as Windows loads then slows right down. It speeds up when doing intensive stuff like Video processing, so its obviously responding to some sort of sensor measuring temperature or something.
Could be an indication that a fan bearings on its way out, I've had them rattling like mad until they get up to speed and then balance out. I usually take it as a sign that replacement is required ASAP.