techPowerUp! posted a review on the Cooler Master RealPower 550W PSU

Cooler Master has engineered a great PSU which has a PCI-Express Power connector and can supply 12V from three rails. Most PSUs have only one or two. For the visual aspect there is a Watt Viewer which goes into a drive bay and automatically displays the current power consumption of your computer - without the need of additional software.

Cooler Master RealPower 550W Review