Logisys 550W ATX12V Computer Switching Power Supply PS550E12, Low Noise & Ripple, Dual SATA Support, w/ 120mm Ball Bearing Fan This 550W power supply boasts its powerful and quiet performance by installing 120mm ball bearing fan with a 75CFM air flow and 2000RPM speed. The power was integrated with dual SATA connectors, four 4-pin molex connectors, one 20pin+4pin ATX connector and one P4 4pin connector. It was made by sturdy Korean made anti-rusty steel to ensure the life time performance. It is 110~220V switchable. With high efficient 680uF 200V capacity, it supplies with steady and clean DC power output. Specifications : 4 Pin + 12V Power Connector for P4. Complies with FCC part 15J class B 115Vac Operation and CISPR22 230Vac Operation. Meet UL 1950. CSA 22.2 Level 3 Requirement. Over Voltage protection. Over Power protection. Short Circuit Protection. 100% Hi-pot AND Function (Chroma)tested. 100 Burn-in under high Ambient Temperature(50C). MTBF above 100.000 Hrsat 25C. Low Noise and Ripple. Energy Star Efficiency. More Pictures : Click to enlarge: