Today I'm going to take a look at one of the most, if not, the most powerful heatsink on the market: The SLK800-U. Thermalright has been the performance king for quite a while, this is a well known fact with the enthusiasts/gamers/overclockers. Lately the competition has come up with nice SLK-Killers such as the Aero line from coolermaster and the 7000CNPS from zalman, but still, no other heatsink has come close to beating this one.