Product Detail The CP-850 features a unique design with an advanced cooling system, exclusively compatible with the Antec Twelve Hundred, P183 and P193 4 12v rails for even power distribution NVIDIA SLI¿Ready certified, also Meets 80 PLUS certification standards ,along with ATX12V v2.3 and EPSv 2.91 Universal Input with Active PFC, RoHS compliant. Connectors; 20+4 pin, ATX 4 pin, 8-pin EPS, 2 x 8-pin (6+2)PCI-E, . The "Antec CP-850 850 Watt CPX Power Supply Unit for Antec Twelve Hundred, P183 and P193" is best product for you. We recommended Antec CP-850 850 Watt CPX Power Supply Unit for Antec Twelve Hundred, P183 and P193