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"That's exactly what he's getting, I'll show him this post and hopefully he'll swap his PSU out for something better."I think you are underating the capability of a well built 600-650w psu here. I doubt it's the psu holding him back, though that psu can be configured for multirail or single rail.
It can sustain 54a 12v single rail, so that's 600-650w, if you take it at say 75/80% load then it's around 500w with absolute ease.
I have a similar 600w psu and it takes my v64 and 4770k into the 450-500's watts system power and has done for over 5 years now with other gpus.[/QUOT
Clicking off or restarting by the sounds so more than likely a faulty unit.