Glowing review of Seasonic Platinum Fanless 520W power supply

"We were really impressed with the Seasonic Platinum Fanless 520W. It achieved the feat of being the best power supply we’ve ever reviewed.

Efficiency was always above 90%, surpassing the requirements of the 80 Plus Platinum certification by a good margin...

The efficiency numbers are more incredible when you take into consideration that this is a fanless power supply."

Source: Hardware Secrets

Update: TechPowerUp loves it as well.