Take a look at http://www.noctua.at/main.php?show=start
Noctua does a fairly thorough job of charting motherboard compatibility of its heat sinks. For example here is the compatibility list for their NH-U12P, which is approximately the size of the thermalright you are looking at.http://www.noctua.at/main.php?show=comp ... =31&lng=en
They don't just indicate compatibility, but also have comments about the nature of the incompatibilities. I am unaware of any heat sink company that is so thorough about this.