TechAddicts posted a review on the Thermaltake Toughpower 850W Power Supply

Overall, this is an excellent power supply for computer enthusiasts and gamers. It offers a ton of power (850 Watts!), high efficiency, and great stability. There are next gen features on this power supply as well, such as the inclusion of four +12v rails, each tolerating high amperage. The 140mm cooling fan does a great job at keeping this power supply cool and quiet. With all these great features, it should be placed on the list when shopping for a high end system.

Thermaltake Toughpower 850W Power Supply Review