VisionTek 550W Modular ATX Power Supply (900488) E Power Technology Silent Engine technology with 120mm cooling fan EMI filter added PCIe power leads for SLI/Crossfire function Fully Modular EZ cable plug for all power leads 20+4 Pin ATX connector and 4+4 connector to fit PCIe and non PCIe boards Short Circuit Protection Over Voltage Protection, Over Current Protection Black mesh wrapped power leads UL, CE, CB, FCCcertified