I need to replace the Abit NB heatsink on my IP35-E because of clearance issues with my new cooler. I intend to replace it with the Enzotech CNB-S1. But in looking at this and other aftermarket NB sinks they all seem to be either 36mm square or round. The Abit NB sink is rectangular, and seems to be a bit bigger than 36mm in the long direction. Is this sink really cooling something else under there that I have to worry about?