Convection cooling, no heatpipes, and relatively speaking, its pretty small. Id look towards at least the S-963 or S-964 from xigmatek, if not an S1283 or maybe a TRUE or V8 if you really plan to overclock it.
I have no intentions to OC but i was thinking about the ARCTIC COOLING Freezer 64 LP... its the same price as the S-963.. anything preferable over the other?