CPU: i5 - 3570k(i am planning on overclocking)
CPU Cooler: Cooler Master 212 EVO
GPU: EVGA GTX 760 SLI
MOBO: ASUS P8Z77-V LK
HDD: Western Digital WD Blue 500GB
RAM: G.SKILL RipJaws Series 8GB DDR3 1600
DVD: ASUS DRW
For a system using two GeForce GTX 760 graphics cards in 2-way SLI mode NVIDIA specifies a minimum of a 700 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 50 Amps or greater and that has at least four 6-pin PCI Express supplementary power connectors.
Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Total Combined Continuous Power/Current Available on the +12V Rail(s) rated at 45°C - 50°C ambient temperature, is the most important factor.
Overclocking of the CPU and/or GPU(s) may require an additional increase to the maximum combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock being attempted.
The Seasonic M12II-750 Bronze (SS-750AM), with its maximum combined +12 Volt continuous current rating of 62 Amps and with four (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with two GeForce GTX 760 graphics cards in 2-way SLI mode.