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post #11 of 12
Remember to watch the 12 volt rail. I think AMD came out and said you should have 54 amps on the 12v rail(s) for crossfire 5850s.

Depending on how the PSU is designed you could find a 550 with 50ish amps on the 12v. Though it is also possible to find a 600w with 40 amps on the 12v rails. Basically if it is cheap...don't use it.
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post #12 of 12
I would just try your current PSU and if it shuts off... well then you know its time for a new one.
    
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