Is 750w enough?

[dylwing23]

Specs:
->i5-2500k
->Asrock z68 Extreme3 Gen3
->8gb Gskill
->2x evga 560ti
->1tb Seagate Barracuda
->LG optical drive
->2x 200mm red led fans
->2x 120mm black fans

Planning to get
->OCZ ZT 750w
or
->Corsair TX 750w

Also planning to OC 2500k and the 560ti's

Will 750w be enough? If so, which is the better psu? If not, other options that would be good?

 

[ko888]

For a system using two GeForce GTX 560 Ti graphics cards in 2-way SLI mode NVIDIA specifies a minimum of a 700 Watt or greater power supply that has a combined +12 Volt continuous current rating of 52 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 Continuous Amperage Available on the +12V Rail(s) is the most important.

To handle the overclocking of the CPU and GPUs add at least another 10 Amps to the +12 Volt continuous current rating.

The OCZ ZT Series 750W (OCZ-ZT750W), with its combined +12 Volt continuous current rating of 62 Amps and with four (6+2)-pin PCI Express supplementary power connectors, is sufficient to power your system configuration with a two GeForce GTX 560 Ti in 2-way SLI mode.

The Corsair Enthusiast Series TX750 V2 (CMPSU-750TXV2), with its combined +12 Volt continuous current rating of 62 Amps and with four (6+2)-pin PCI Express supplementary power connectors, is sufficient to power your system configuration with a two GeForce GTX 560 Ti in 2-way SLI mode.

If your computer case has a bottom mount power supply bay the get the Corsair because it has longer (20+4)-pin ATX and (4+4)-pin EPS cables.

 

[sarinaide]

Playing around on PSU calculater;

2x GTX 560ti (ref cards); 2500K oc'ed 40%(max you can really do), 2HDD, 1SSD, 4 RAM modules, 5 Fans comes to 650W drain. I would look at a Antec HCP 750

 

[dylwing23]

Best answer selected by dylwing23.