I recently built a tower server to provide room for a nice GPU. I had most of the parts already because I was pulling them from a rack mount server chassis, but I knew that regular heat sinks would not be sufficient. I then discovered, the hard way, that the Cooler Master 212 EVO does not fit on server LGA1366. The screws were not able to thread into the Xeon backplate. The Cooler Master used to be my go to cooler for desktop applications. After the Cooler Masters were returned, I ordered a set of Intel Server/Workstation coolers because I knew they would be compatible. They did a decent job, but had an unbearable loud whine to them. I keep my servers in the spare bedroom next to mine and you could just hear the things screaming away through the door/walls.
After I little more research I settled on spending more money and ordering two Noctua i4 CPU Coolers. Their website clearly shows they are compatible with the LGA1366 socket and Xeon backplate. There were also some good reviews from people online saying these fans were quiet and worked well. The only bad reviews were the ones where people did not realized they were shipped a server CPU cooler and had to order the motherboard backplate separately.