Need help silencing a loud-ass fan.

So I've gotten bigger fans, gone with water cooling, and there's this one mother of a fan on my mobo that's loud as ass. From my mobo's book, it seems to be cooling the system controller. I tried vacuuming the thing out and using compressed air to get it as dust free as I could, and the fucker is still screeching away (relatively, anyway).

Is the system controller something that even needs a fan, or could a heat sink do just as well? It's screwed onto the mobo, and has a standard 3(?) pin connector to the board, if that helps any.

Suggestions?

now days they get pretty hot. Id leave it on, but you could try taking it off and it MIGHt be okay. depends on the mobo and the case/room temp.

uhhhh try going with a more quiet fan if you can find one that will fit.