Final Thoughts and Conclusions
Our main concern going into this review was having to test the validity of the +12V rails that are touted so openly with this power supply. It’s not every day a company pushes the envelope, and it certainly is not every day a company pushes the envelope in the power supply market. After doing some extensive testing, investigating, and evaluating, we can say that it appears Cooler Master has done just that. With 6 genuine +12V rails, 850 of power, and highly stable and accurate rails throughout, the Real Power Pro 850 should be a contender in the high-end power supply market.

Clearly our impressions of the Real Power Pro 850 and the numbers we have generated thus far in the review indicate that this is a very good power supply. Perhaps the only aspect of this product left to evaluate is its price. The RPP850 is sold across the net at the fairly reasonably price point of $250. This makes the RPP850 a full $50 more expensive than the very comparable Silencer 750 that was also tested in this review. However, the increased power output, just as impressive rail stability, and native ability to support dual 8800GTX graphics cards make this card a bit more attractive than the 750 in our opinion. The RPP850 is $30 less expensive than the TAGAN TG900-U95, which is widely considered to be the very best power supply on the market with a maximum power output of less than 1kW. We haven’t had any hands on testing with the TAGAN unit, we hope to very soon, so we cannot draw any conclusions between the two products. However, the RPP850 sports very similar features, boasts two more +12V rails, and various other features that are certainly comparable with the TG900-U95. The RPP850 is also the same price as the ToughPower 850W from ThermalTake. The ToughPower 850W has several advantages over the RPP850, most noticeably two of the 4 +12V ratings pushing 30Amps, as well as several disadvantages, including the lack of the 2 additional rails. We have not tested the ToughPower 850W yet either, but we have to assume it performs comparably to the RPP850. With this in mind it would seem that the Real Power Pro 850 from Cooler Master is an appropriately priced power supply that provides stable and reliable power to the hungriest gaming machines out there.

Pros
+ Six +12V rails
+ One large, very quiet fan
+ Sleeved cables
+ Mirror finish
+ High efficiency
+ Fairly stable and accurate voltage rails
+ Reasonably Priced
Cons
- Lack of an on/off switch
Rating
9.3 out of 10