Hardware Secrets takes a look at this high-end 850 W power supply from Cooler Master targeted to systems with more than two video cards and tested to see if it can really deliver 850 W.

A quote from the article:

Real Power Pro is the high-end power supply series from Cooler Master, featuring models from 550 W to 1,250 W. We reviewed the 850 W model (a.k.a. RS-850-EMBA), which features a big 135-mm fan, dual-transformer design and six +12V rails, being targeted to high-end systems featuring three or four video cards. According to Cooler Master this unit was labeled at 50º C and can deliver up to 1,000 W during peaks. Let's see whether this is true or not and also let's take a trip inside this unit.

>> Cooler Master Real Power Pro 850 W Power Supply Review