OCC checked out this 800W PSU and concludes it's a very capable unit with 80Plus Silver efficiency.

"The Mushkin Enhanced Joule 800W power supply proved to be a very capable power supply following the OCC power supply testing methodology. The power supply itself is really hard to fault; satisfactory build quality, good DC voltage load regulation and very low AC noise/ripple in combination with high efficiency are everything the enthusiast needs in a power supply."



Link: Overclockersclub