PSU able to handle new video card?

Evga Geforce gts 250 video card
July 3, 2009 at 21:43:07
Specs: Windows XP
I am currently looking to upgrade my GeForce 6800 video card to a GTS 250.

My concern is my PSU. The GTS has a "Minimum of a 450 Watt power supply. (Minimum recommended power supply with +12 Volt current rating of 24 Amps.)"

From what I can tell, my PSU has a 460W max and I believe 32A. The label is almost totally obscured, but looking around I found this image of the label

which is identical to the part of my label I can see. Am I reading my PSU label correctly? Do I have 32A max on my +12 V rails with a 460W max? If so it seems that it would be sufficient to run the new video card, but I am not sure. Also the PSU is about 4 years old now if that matters.

The rest of my specs:

Dell XPS Gen 5

Pentium D 3.0 GHz
1GB DDR2 Ram (upgrading to 4 gigs)
250 GB Hard Drive
16x DVD/RW
Windows XP

(I have seen posts similar to this one here, but wanted to be certain.)


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July 4, 2009 at 00:09:42
Each +12v rail on that psu provides 17a with a max combined +12v of 32a.

Your pc will run off +12v_A rail. That leaves the 17a +12v_B rail to run a video card; that falls short of the 24a required. Without checking, the 24a requirement sounds about right for a GTS250.

You'll need a new psu. This one has a single 60a +12v rail.


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July 4, 2009 at 07:35:08
Wattage calculators are fairly useless. A 500W PSU is adequate for just about all systems these days, provided it's a good one & has the proper amperage specs. Maybe someone will develop an amperage calculator someday?

So what's all this rubbish about multiple 12 volt rails?

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July 4, 2009 at 10:19:15
Thanks for the replies.

So, the only place that the video card would draw amps from would be B rail which could supply 17A. This would be going through the 6 pin connector. No power comes to the card from it being plugged into the motherboard where the A rail is supplying power? Would I need a video card that requires 17A or less from the rails if it is only getting power from one rail? This multiple rail thing is screwy.

Thanks again.

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