Power supply for i7 and SLI.

Hi,

I'm currently looking to build a new computer, here's the plan:

I7 930
Asus P6T
6GB DDR3 1333
2x HDD 320GB
1x HDD 1TB
1x DVD-RW
GTX 470
Lian Li PC-B10 case

I usually keep my PC 3+ years. With this, long term, i would probably add a second GTX 470, SSD drive and replace DVDRW with some Blu-Ray drive when it gets cheaper (and games started shipping with Blu-Ray disks hehe).

What wattage (long term) do you think would be required to run this ? Also, which brands/models would you consider (modular please). I know Corsair does quality PSU, besides that, i'm a complete ignorant (kind of hehe).

Thanks !

trep-
11 answers Last reply
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  1. I would suggest you get a Corsair or SeaSonc. 700 watts is recommended to SLI with the 470's to leave a little headroom I would suggest 750 watts but you could probably get away with a goos 650 watt unit.

    Corsair 750 watt
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817139006

    SeaSonic 750 watt this unit is 80 plus gold certified so its a little expensive
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817151087
  2. The TX serie of Corsair doesn't look modular. How much AMP should i look for on the 12v rail for dual GTX 470 ?

    Thanks !
  3. The GTX470 eats almost as much power as a GTX480. A 750 watt Corsair will be enough - barely. I'd go to an 850 watt PSU. But then, I tend to overspec PSU's.

    If you are seriously planning SLI, you do not really need a modular PSU. You will not have many cables left over.
  4. 850 watt for SLI or a single card ? hehe
  5. 850 for any future upgrade you wish to do with that copmuter.
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817256058
  6. I'm not sure why anyone would get a GTX 470 for SLI when benchmarks prove 5870 in Xfire do much better than SLI 470s. The 470s also consume way more power. So less performance, more power consumption. I don't see the point. I have 2 nVidia GPUs in SLI. I am not a fanboy, just a realist.
  7. Fixed: My system is in my sig.
  8. one-shot said:
    I'm not sure why anyone would get a GTX 470 for SLI when benchmarks prove 5870 in Xfire do much better than SLI 470s. The 470s also consume way more power. So less performance, more power consumption. I don't see the point. I have 2 nVidia GPUs in SLI. I am not a fanboy, just a realist.

    i agree with you like 99.5%, but thats not what this thread is about.
  9. shovenose said:
    i agree with you like 99.5%, but thats not what this thread is about.


    You are right. I got off topic a little. I have a Corsair TX750W PSU and I would hesitate putting SLI 470s on it. I'm sure it's possible, but it wouldn't leave much room for expansion in the future.
  10. Could you post the article/review regarding the difference between the 5870 in crossfire and the 470 in SLI please ?
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