combine rails?

Computer Forum Power Supplies and UPS's
1

I have two 7900gt’s that require 28A. I’ve looked EVERYWHERE and i cannot find a psu with multiple 12V rails that can give this many amperes. Is it the amps PER rail that are important or the combined total of amps of all rails? Also, how do i know whether or not a psu allows you to combine rails? I hear this is possible.

I’ve been looking at this psu and i think its great but i dunno if i can combine the 12v rails or not for the added amps.
http://www.newegg.com/Product/Produ...N82E16817104015

AMD athlon 2.2ghz 64bit 4200+
Vapochill Micro
eVGA 7900gt x2 sli @ 550mhz
Antec Truecontrol 2.0 550w psu
Asus A8n SLI premium
74gb WD raptor
300gb Maxtor Diamond
Corsair x2 1gb XMS ddr400
Air cooled: x3 80mm, x2 120mm

2

Hmm…your link doesn’t seem to work.

I believe that the 28A is what the 12V rail must provide at minimum, combined or otherwise.

Is that Antec you listed not doing the job for you? If not, the following units should do the job:

Enermax EG-701AX VE 600W
Fortron FX700-GLN 700W
OCZ OCZ600ADJSLI 600W
Silverstone SST ST65ZF 650W

I know that the Enermax and OCZ units I listed have been used with a lot of people sporting high-end setups.

Another option (and is $250-300) is the PC Power & Cooling 510 SLI. I couldn’t find the 510-SLI at Newegg, but I’m sure if you go to their website, you can find it. The 850 an 1K (1000W) are available, but you’re looking at over $400 for either one. However, when you’re the best, you can charge a premium. Still the others I listed will do the job, especially the Enermax and OCZ units.

3

:x: the link of mine was to the Fortron FX700-GLN. I personally think its the best out of that list you gave me…what do you think?
Thx for your reply btw

4

I like Fortron, but the FX700-GLN is pretty new to the market. The Enermax and OCZ units have been out for awhile, but other than that, I don’t see why it wouldn’t work.