Neoseeker has published a review of Cooler Master's massive 850W Real Power Pro PSU

I was quite impressed with the quality of heat sinks that Cooler Master used in this supply. Upon inspection, they appear to be pieces of Aluminium T-channel that has been cut to act as heat sinks for the SCRs (Silicon Control Rectifiers). These SCRs can get quite hot, and will burn out if not sufficiently cooled. Good cooling is a must in any power supply. The large 135mm fan helps too.

Cooler Master 850W Real Power Pro Review