Apr 19, 2012
My build is composed of the following, how many watts should I look for in a PSU?

Case - Cooler Master HAF 912
CPU - Intel Core i5-2500k
MB - ASRock Z77 Pro4
GPU - EVGA GeForce GTX 480
RAM - Patriot 2x4GB DDR3 1600
HDD - Seagate Barracuda 500GB 7200rpm
Optical Drive - LITE-ON DVD Burner


Nov 17, 2011

The amps on the 12v rail(s) is more important than the watts. Look at that first. And yes, the PSU's listed so far are all good.
For a system using a single GeForce GTX 480 graphics card nVIDIA specifies a minimum of a 600 Watt or greater power supply that has a combined +12 Volt continuous current rating of 42 Amps or greater and that has at least one 6-pin and one (6+2)-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 factor.
480 power
Idle - 51 / 190 Watts
Load w/Furmark - 94 / 420 Watts

So Yes any quallity 500->650 Watts is good for single card, If thinking of going SLI then consider 650 Watts as Min.

Hoping that the 480 performs better than a 6870 as total loaded system power (i5-2500k) is only around 350 Watts.