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GTX 480 SLI Power Supply Requirements

Last response: in Graphics & Displays
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June 24, 2010 7:12:51 PM

Hi all

I have just purchased 2 GTX 480’s to run in SLI and was wondering if my PSU was up to the task? I have also got a i7 920@4GHz, Patriot Viper (3x2GB) DDR3 PC3-12800C9 1600MHz Triple Channel, 2 x 250Gb 720 Hard Drive’s, 1 x Blu-Ray/DVDRW drive, 1 x DVDRW drive, Creative XFi Audio Sound Card, Bose Companion 3 Series 2 Speakers, Samsung 23” Full HD Monitor............think that’s about all that drains the PSU if there is anything else I have forgotten then will add it after or please ask.

My PSU is a CoolerMaster Real Power M1000 and link to it is here:

http://www.coolermaster.co.uk/product.php?product_id=25...

All advice greatly received.........as usual
a b Î Nvidia
June 24, 2010 7:18:10 PM

You should be fine with that PSU.
June 24, 2010 7:19:04 PM

At stock clocks I have seen a pair of GTX 480s draw 850W. When overclocked, I seen them draw 1200W. So if you don't overclock, you have enouogh.
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June 24, 2010 7:24:14 PM

Thanks very much for the quick reply!

I went to the CoolerMaster website where it has a PSU calculator. I entered my specs and it came back with a 1200w PSU required! I did think that was a bit excessive!
June 24, 2010 7:25:41 PM

Will the i7 920@4GHz be ok to run the 480 SLI setup? No bottlenecks etc?

Thanks
a b Î Nvidia
June 24, 2010 7:26:27 PM

Lol CM love to try and get more money from you, they said I needed a 850-1000W CM PSU for my spec's in sig.

A Corsair 650W would handle it easy. (Got an 850W so I can go CF in the near future.)
a b Î Nvidia
June 24, 2010 7:27:18 PM

gonesy said:
Will the i7 920@4GHz be ok to run the 480 SLI setup? No bottlenecks etc?

Thanks


No bottlenecks, If a Core i7 920 @ 4Ghz can't do it, then what can.... :pt1cable: 
a c 172 Î Nvidia
June 24, 2010 7:29:10 PM

gonesy said:
Thanks very much for the quick reply!

I went to the CoolerMaster website where it has a PSU calculator. I entered my specs and it came back with a 1200w PSU required! I did think that was a bit excessive!

1200w might be required to run four but not two.
Quote:
We all know that the GeForce GTX 480 is not exactly the most efficient GPU on the block with its 250W TDP. Four of these when peaking can already consume a full KW of energy. Add another 130 W for the processor another 40 for the chipset and then some more for peripherals and 1200W really is something you need at minimum.


Source.
June 24, 2010 7:35:48 PM

Thanks very much for all the very quick replies!

I am glad to hear that my PSU will be adequate for the setup. I dont intend to overclock, I would have thought with 2 x 480's what would be the point! If they cant run most things at stock then what can?
June 24, 2010 7:37:47 PM

One last question on this point.........the PSU has 6 x 12v rails (as you can see in the link) with varying amps on each..........how do I know what the cards will be getting?

Thanks again
!