One of my home systems has two of the same graphics card as you have mentioned and I'm running a 750W PSU with no problems so far... and I fold on it 24/7. Now that being said, I don't run an overclock on my CPU so that might be pushing it a little.
__________________ Creationists make it sound like a ‘theory’ is something you dreamt up after being drunk all night — Isaac Asimov All thinking men are atheists — Ernest Hemingway Faith means not wanting to know what is true — Friedrich Nietzsche
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