Everybody knows about Thermaltake, but most people don't know that this heatsink manufacturer also makes 1U heatsinks. Like a good desktop heatsinks, 1U heatsinks work best when they are designed to be super efficient, and use the best possible materials. This particular cooler, the Thermaltake DTFCF014-1 (which we will be calling the 1U Extruded after its aluminum construction) is really only good for older 1U servers with processors producing less than 50W of heat.