I'm going to be running a E4300 overclock, right now I have a coolermaster aquagate system for the processor only.. I was wanting to limit the fans as much as possible, so I've been interested in putting my northbridge/videocard on a passive loop... is it possible to do a passive system which can sustain video overclocks? .. possibly a large oil cooler/heater core mounted on the side of the case externally.