I bought a Thermalright True Spirit 140 for the most part based on this article. So far its working quite well with a Phenom II X4 955 OC'd to 3.6 Ghz (its a C2 stepping - hot and not much OC headroom). My gaming temps have dropped about 10-13C in a badly ventilated ten year old Antec case. The fan completely clears the ram slots with standard height memory, but just barely. It also clears the side panel on the case, but also, just barely (the SLK3700AMB is a little over 8" wide). The hardware was pretty easy to install save for the fan. I spent more time wrestling with it than installing the heatsink. Whoever invented wire fan clips should be beaten severely. Still, its a very quiet, effective cooling solution and money well spent.