7900gs sli power requirements?

[lahire149]

I have a 520w (+12V 33A) OCZ Powersteam non-sli version. The SLI version have +12V1 (20A) and +12V2 (18A). And I was wondering if I just used a dongle adapter if my psu would be able to cope with SLI 7900gs. I've read that a single 7900gs uses 22A but in SLI the requirements is only 28A.

Does this sound correct to you? Will my PSU work?

 

[Zap]

Should work just fine unless you have a monster system with a hugely overclocked CPU and 10 hard drives all clamoring for 12v power. BTW what are your other system specs?