KitGuru tried the BitFenix Whisper M Series 850W PSU
A quote from the article:
It has been a long time since we reviewed a Bitfenix power supply and at the time I walked away feeling less than impressed with the overall quality and performance of the unit. Today we analyse the relatively new BitFenix Whisper Series 850 watt supply, a pure modular unit with 80 Plus Gold Certification.BitFenix Whisper M Series 850W PSU Review @ KitGuru