The Cooler Master MWE 550W V2 Bronze PC power supply  offers  80PLUS Bronze efficiency , a performance guarantee of 85% average efficiency for a typical load. The DC-DC circuit design   ensures the safe power supply of components reliably. The  120mm HDB fan  has a semi-passive mode up to 15% load. In other words, less wasted energy and less noise for basic system operations. Discreet, the flat black cables are flexible, making them easier to implement in your system while taking up less space. A real practical "plus" for small enclosures.

Specifications:
80 PLUS Standard: 80 Plus Bronze
Modular: No
Modularity: Not Modular
Power connector(s):
1 X +12V (P8 - 2 x P4 power supply)
6 X Serial ATA power supply
1 X ATX 24 pin
3 X Molex (4 pin) Female
2 X PCI Express 6 + 2 pin
Power Supply Format: ATX/EPS