I am looking to buy a EVGA GTX 560ti, but the EVGA site recommends a PSU that can do 30 amps on the +12v rail. I have an Antec Earthwatts 650watt psu, that has multiple 12v rails but the max one can go is 25 amps.
Will it work on my psu if I use 2 different 12v rails, which would in theory give it almost 50 amps to use? or does it need to be able to hit 30amps on 1 rail?
Also does anyone know the amp requirements for the AMD 6950's? All the sites I have checked just show a Watt and connector requirement. If AMD's offering only needs 25 amps then maybe I can do that instead.
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The EA650 is plenty, the power recommendations are for the whole system not for the card itself, and the EA650 has plenty of power for any single graphics card so you wont have any issues.
The Antec Earth Watts EA-650 has a maximum +12 Volt current rating of 45 Amps.
That's more than sufficient to power your single GeForce GTX 560 Ti graphics card system.