GTX 480 SLI Power Supply Requirements

[gonesy]

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=2532

All advice greatly received.........as usual

 

[Rustyy117]

You should be fine with that PSU.

 

[rofl_my_waffle]

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.

 

[gonesy]

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!

 

[gonesy]

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

Thanks

 

[Rustyy117]

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.)

 

[Rustyy117]

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....

 

[Mousemonkey]

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.

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.

 

[gonesy]

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?

 

[gonesy]

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