"As the originator of clear power supply in the industry, Logisys has come up with the enhanced model PS550AC to respond to the increasing needs for better quality clear power supply. The power boast its performance and beauty with maximum 550W output, 20 and 24 pin ATX plug, two serial ATA connectors, 6 4pin 12v connectors, and PCI express connector. All the cables and wires have been sleeved with green UV interactive net. We extended the cables and wires to at least 19¡± up to 24¡± long in order to be compatible with almost all chassis in the market, even most of the full size tower chassis. Dual silent fans with blue LED lighting have been added for maximum cooling performance." ~LogisysComputer.com