I've just OCed my comp by a fair bit, and I found that after awhile, it just crashes. And I managed to isolate the problem to my Northbridge, which more or less burnt my hand when I touched the heatsink. So now I'm looking for a good heatsink for my northbridge. Preferably with a fan, but those seem to be alot more expensive, or they don't seem to be very effective (the Tt Extreme Spirit Cooler for one, cheap but the heatsink is so small, and the fan's only 3cfm at max, generating 41dB). Anyone got any idea where I can get 40mm fans and just put it on top of a cheaper heatsink, say, the Zalman ZM-NB47J? Or just a plain old HSF combo. Or if you've got experience in this, and have a good heatsink you're using. Cos my bus isn't too happy running at 1.2Ghz (instead of 800Mhz).