I was wondering what made heatsinks Intel or AMD heatsinks or if it really doesn't matter. I have a http://www.swiftnets.com/products/mcx4000-T.asp and it's considered a Intel Socket 478 heatsink. However, does this mean it is absolutely incompatible with a Socket 939 for a AMD Athlon 64? Would i really have to buy a new heatsink or can i just swap it over?