CMP-PSUP550W/S PC Power Supply ATX 550 W Silent Fan 12 cm This 550 watt computer supply is equipped with a silent 12 cm fan. Its noise level is less than 24 dB (30 dB is comparable to a quiet bedroom in a city). This 550 watt computer supply is perfectly compatible with AMD and Pentium systems and is suitable for almost every PC. The power supply has both a CE approval and a passive PFC. It is equipped with a 24/20 pin main board power connection. Also included are two S-ATA power connectors and a 6 pin PCI-Express connection. PAY ATTENTION: Feeding only works if connected to the motherboard or PSU tester, which is the standard security procedure.