I recently picked up an Abit KN8 motherboard to use with a leftover Athlon X2 from a computer with a failed motherboard (that's another story...). I was surprised to discover that the heatsink from the other motherboard was incompatible with the new motherboard, despite having the same CPU socket.
My heatsink has 4 screwholes, one at each corner. The new motherboard has only 2 screwholes, on opposite sides. There is also a plasic mounting bracket, with two clips on alternating corners.
So, my question is this:
How can I tell if a new heatsink will fit on my motherboard/bracket? I had assumed I would just reuse the old one, or search by the socket type (939). If possible, I'd like to buy an aftermarket one with a focus on being quiet--does anyone have advice about this?