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Geforce 8800 GTS 320MB Power Requirements

Last response: in Graphics & Displays
April 17, 2007 6:36:31 AM


I am purchasing a Geforce 8800 GTS 320MB next week. I had a look on the web as to what the power requirements are for this card and most web sites mentioned that one requires a minimum power supply of 400W with 26A output. I currently have a 400W PSU, but with 20A output on the 12V rail. I had a look a other power supplies (from 500W up to 1000W) like Antec, Vantec, Enermax, Thermaltake etc. and they all range between 18A and 20A on the 12V rail. Isn't there a possibility that the "26A" rating is a rating combined from all the other rails put together. Because I couldn't find a power supply with a 26A rating on the 12V rail alone. All that I can think is that all the rails' outputs measured together can give one 26A. Could someone please shed some light on the situation please. The spec listed on my PSU:

AC Input:
230V 50Hz (5A).

DC Output:
+3.3V : 28A
+5V : 40A
+12V : 20A
-5V : 0.5A
-12 : 0.8A
+5Vsb : 2A Peak : 2.5A

+3.3V & +5V : 225W
Total Power Max : 400W

Could someone work this out for me and let me know if this PSU will work?
April 17, 2007 6:37:44 AM

Sorry... I posted topic twice.
April 18, 2007 11:12:59 PM

you will at least want a 550 watt power supplie
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April 23, 2007 2:56:51 AM

Well, that was a great NON-answer fly...

From what I can see it's the combined 12v connectors that most of the SLI ready graphics cards of today come with.

So this video card ;

PNY GeForce 8800GTS 320MB 320-bit GDDR3 PCI Express x16 HDCP requires a minimum 400W system power supply (with 12V current rating of 26A)

would be satified with this power supply (plus some!) ;

HIPER HPU-4K580-MS ATX12V v2.2

580W+3.3V@30A,+5V@36A,+12V1@20A,+12V2@18A,-12V@0.8A, +5VSB@2.5A = at least 38A

Anyone, please feel free to correct me if I'm wrong.
April 24, 2007 3:41:52 AM

Thank you for the info.

I have read through most of it but I'm still kind of scratching my head.
I am interested in building a new system the uses:

2 Intel Xeon E5320 Clovertown quad-core 1.86GHz Socket 771 CPUs

SUPERMICRO MBD-X7DAL-E-O Dual Socket 771 Intel 5000X ATX Server Motherboard

1 top end 8800GTwhatever Graphics Card

From what I can see, I take it that this PSU would fit the bill...

ENERMAX Galaxy EGX1000EWL ATX12V/ EPS12V/ BTX 1000W Power Supply

It should be, 900W and 75A are dedicated to the 12v rails alone.

Thanks for helping the helpless...
a b U Graphics card
April 24, 2007 4:21:07 AM

What are you going to use this rig for? This rig looks alotta overkill to me, unless youre working for hollywood and making movies....
April 25, 2007 1:21:47 AM serve as a heater for my cold tootsies on a freezing morning? wife left me and I don't feel so alone with it running under the covers all night?

Ummm...I don't have a frying pan?

Ummm...I got board watching 100 dollar bills burn so I thought I'd buy stuff I don't need?

Ummm...I'm into animation and post processing (plus I consume huge amounts of clock cycles just being a wise guy), all of which are very time consuming unless one has a number of very high end systems composing a render farm...