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Powering 8800 GT in SLI

Last response: in Graphics & Displays
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November 19, 2007 5:52:04 PM

Hello,

I'm just a tad new to the 'build it yourself PC' scene, and I'm a bit confused as to how to power my dual 8800 GTs.

EVGA's website recommends 22Amps on the +12 volt rail, or 24 in sli mode. Is that total, or each card in SLI mode?

Also, how do rails work? I can't find almost any PSU that has more than 20A's in any single +12V rail, how am I going to power both cards without dropping a lot of money.

More about : powering 8800 sli

November 19, 2007 6:05:26 PM

The amps is for the whole system, not just the cards. They are looking for the 24amps on the combined +12v rails. Usually there is a sticker on the PSU that lists watts and amps to each rail. If you find the watts supplied to the +12v rail, divide that by 12 to get your amp rating. What PSUs are you looking at?
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November 19, 2007 6:48:40 PM

I wouldn't do anything with a decent brand and 550-600W. I don't skimp on power suppies either should you
November 19, 2007 6:58:01 PM

itotallybelieveyou said:
I wouldn't do anything with a decent brand and 550-600W. I don't skimp on power suppies either should you


But I'm looking to purchase a powersupply I need for my system, not one with oodles of power that rapes in the power.
!