My friend has the power supply mentioned in the title and a 670gtx, with a phenom II X6 1090t @ stock, 16gb 4x4 1600 corsair RAM, Seagate 1tb, 180gb intel ssd, and currently a Crosshair IV, that will be a crosshair V when he'd like to attempt sli. My other friend is building a pc and buying parts as he can and wants a 670, well we decided to sli them together just because lol just wondering with no cpu or gpu overclock would the psu be enough? I saw some say 800-850, and one post saying a 750watt would work without an oc