ZEROtherm BTF90 CPU Cooler Review
 

We would not suggest that the ZEROtherm is the best air cooler we have tested, because it isn't. The Thermalright and Tuniq 120, as well as some push-pull designs, cool better in extreme overclocking than the BTF90. However, the BTF90 does very well to just below the top, with a small, quiet, low-output fan. This fan yields very low noise levels, and the ZEROtherm would be a great choice for a low-noise PC that can still overclock well. However, the BTF90 will not fit slim cases, rack-mount system designs, or under a power supply that mounts above the motherboard. Please check the dimensions carefully if you are planning to use the ZEROtherm in a small HTPC case.

http://www.anandtech.com/casecooling...oc.aspx?i=3062