Antec CP-850 850 Watt CPX SLI CrossFire 80 PLUS Modular Power Supply 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 SLIReady 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,