Q-Tec ATX 550W Dual Fan Power Supply Unit - Suitable for ATX12V version 2, fully compatible with high power CPU\'s - Suitable for both 24 and 20 pins motherboard connections - 2 x 80mm, 27 dB(A) low noise fans; speed controlled for optimal cooling with lower noise - 6x peripheral, 2x floppy drive and 2x S-ATA connectors -