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PSU advice on 8-Series cards?

post #1 of 8
Thread Starter 
Ok, heres currently a dispute between me and a friend and we are trying to figure out whether or not a +12v dual rail combines all of their amps into one piece of hardware. Because all of the 8800 GTXs normally require 450watts with +12v@28-30a. And most of the 500-700w power supplies only specify 18amps on most +12vs. Would we get our maximum requirements with one with 18amps on each +12v or would we specifically have to find a higher end psu such as a pc power and cooling?
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Conquistador
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post #2 of 8
The card comes with 2 power connectors. It will pull 15 or so amps from each connector.
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post #3 of 8
Get a PSU with a single large rail.

PC P&C makes the silencer..
Seasonic makes one I forget what it's called....


There's a few out there. They'd be my best bet.
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post #4 of 8
The power requirements listed by nVidia are the requirements for the WHOLE system, and not just the video card. Also, Busa is correct. For a single 8800GTX you don't need that insane amount of power.

Thus, a good quality PSU of 450W+ with a total max load of 28A-30A on the 12V rails will do just fine.

A few recommendations:

Low end:
FSP Group (Fortron Source) AX450-PN, 12cm FAN, version 2.0, 2 SATA, PCI Express, 450W $53.99 (29A on the 12V rails)

Mid rage:
SILVERSTONE SST-ST50EF ATX12V 500W Power Supply - Retail $87.50 (35A on the 12V rails)

High end:
PC Power & Cooling Silencer 610 EPS12V EPS12V 610W Continuous @ 40°C Power Supply - Retail $169.99 (49A on a single 12V rail).

SLI:
SILVERSTONE ST85ZF ATX12V/ EPS12V 850W Power Supply - Retail $279.99
    
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post #5 of 8
Thread Starter 
Alright then cool, because I'm currently running a OCZ 520w Modstream that rates +12V@28amps but i do plan on getting a case which already supports two power supplies and using the OCZ separately for maximum performance.
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post #6 of 8
You might want to consider to run the video cars separately with one of these:
FSP Group (Fortron Source) BoosterX 3, 300W ( Max. 400W ) SLI Graphic Power Supply - Retail $89.99
    
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post #7 of 8
Thread Starter 
aw thats a pretty neat external psu their buddy thanks.

Heres a few cases I'd recommend for dual psus in case anyone was wondering:

http://www.newegg.com/Product/Produc...82E16811163057
http://www.newegg.com/Product/Produc...82E16811200028

If you guys find anymore post them here please.
Conquistador
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Conquistador
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post #8 of 8
Nice Thank you

The FSP fits in a 5.25" drive bay, so it you don't want to upgrade your case, and you're otherwise happy with your PSU, this might be an option.
    
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