Hardware Canucks has posted a review on the new Corsair Professional HX850 850W power supply

While we hope that overall build quality will not be sacrificed to eke out the best possible efficiency numbers, some companies have made sure their old "high quality, high efficiency" mentality stays is place. As you may have already guessed, Corsair has been fighting with all hands on deck to ensure output quality remains top notch while efficiency numbers increase. One of their latest creations is the HX850; a power supply that promises to take this merry bunch of buccaneers to the pinnacle of power supply supremacy.

Corsair Professional HX850 850W Power Supply Review