Need help picking PSU for 3-way SLI (GTX280)

I need help picking power supply with enough power, and right ports (connectors) for 3 way SLI of GTX280 cards

Enough power to be provided for next components:

mobo: Nvidia 790i FTW
HD: 2 Velociraptor dirves
Videocards: 3 GTX280
CPU:QX9770
RAM: DDR3 Patriot Viper 1800MHz 4 sticks of 1 GB each
And of course all the fans to cool it all
22 answers Last reply
More about need picking gtx280
  1. stove said:


    i havent seen any of the 1500w on new egg, and one in the link is for 230Vac in us there's 110Vac outlets, is there 110vac one or i got something misunderstood ?
  2. If you have the budget for 3 GTX280's, don't skimp on the PSU.
    Look at PC P&C 1200W.
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817703012

    Their customer support is outstanding, and you should never need it.
  3. geofelt said:
    If you have the budget for 3 GTX280's, don't skimp on the PSU.
    Look at PC P&C 1200W.
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817703012

    Their customer support is outstanding, and you should never need it.


    it has 6- 6 pin connectors and 2- 8 pin connectors are there any adapters to transform 2-6pin connectors into 1- 8pin connector ?
    and it dosent seem to be modular... btw is there anything i can do to improve my cable management with non-modular PSU ?

    and is PC P&C is that much diff quality from antec orthermaltake,
    and if 1200w be enough ?
  4. CorsairHX 1000 more than enough for those.
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817139007

    Why are you building a rig like this? You would get the majority of the performance of a machine half the price?

    Hope you have a 2560 x 1600 panel otherwise all that power will be going to waste.
    http://www.tweaktown.com/articles/1466/nvidia_geforce_280_gtx_in_tri_sli_tested/index.html
    Hope that supports my argument, i cant read it because of tweaktown stupid ad-blocker anti discrimation.
  5. I have to agree with chookman about the PSU recommendation and the question of the reason behind building a rig like this.
  6. starhoof said:
    it has 6- 6 pin connectors and 2- 8 pin connectors are there any adapters to transform 2-6pin connectors into 1- 8pin connector ?
    and it dosent seem to be modular... btw is there anything i can do to improve my cable management with non-modular PSU ?

    and is PC P&C is that much diff quality from antec orthermaltake,
    and if 1200w be enough ?


    The GTX 280 cards come with adapters for 8 pin pcie connectors.
    A unit that would not require those adapters would be:
    http://www.newegg.com/Product/Product.aspx?Item=N82E16817703020

    Since you will be using most of the connectors anyway, the value of modular is somewhat diminished. Some say that modular is less reliable, but I really think it is a non issue. Cable management is determined by the case, and your attention to detail.
  7. ok, i think now that i read that article i will buy 1 less videocard, thats 600 bucks less, thx for the article =)
  8. I wasnt looking at the Corsair 1000 for the modular design geofelt. Was giving a solid PSU with the connections required for Tri-SLI. The corsair comes with 6x6+2pin so theres no need for adapters. and its a far cheaper option.
  9. chookman said:
    I wasnt looking at the Corsair 1000 for the modular design geofelt. Was giving a solid PSU with the connections required for Tri-SLI. The corsair comes with 6x6+2pin so theres no need for adapters. and its a far cheaper option.


    you think 1000w would be enough for my hardware ?

    wow, thanks man, #1 thx for the article that got me out of getting 3 videocards, now i will get 2 =D #thx for the psu choice, i do think corsair is a high quality company
  10. Even if you want to spend that type of money on a System, it's silly to buy it now. Next Month it will be owned by a Nehalem System.
  11. zenmaster said:
    Even if you want to spend that type of money on a System, it's silly to buy it now. Next Month it will be owned by a Nehalem System.



    I had the same thing the other day..

    Someone wanted a Skull Trail Motherboard...

    I said dont even think about it

    A Nehalem will be out soon and with a Intel chipset using SLI--- It will be what we are looking for


    Oh a 920i will be mine,, oh yes ... dribble dribble etc etc
  12. Hes something else for you to take a look at Starhoof
    http://archive.atomicmpc.com.au/forums.asp?s=2&c=7&t=9354

    Actually power consumption of graphics cards (add to this the rest of your compontents also. This lists a full load of 3xGTX280's at 520w thats a full load, which you might not really ever hit. 2xGTX280's is at 345w, off of a sudden you start to realise that your beast of a rig doesnt need as much power as you thought.

    Another TRI-SLI review, this ones a little more leaning toward tri being a little nicer (could be updated drivers)
    http://www.guru3d.com/article/geforce-gtx-280-sli-triple-review-test/1

    The other thing you gotta realise is your beast of a machine might run a game at 250fps, but you have to take refresh rate into account (generally around 60-100hz) so where do all the other frames go? They arent used.
  13. Go to the source for your information, 1000w is recommended for 2way SLI in my ASUS Crosshair II Formula, however for a 3way setup the manual defaults to the Nvidia website!

    Nvidias reccomendations:

    http://www.slizone.com/object/slizone_build_psu.html
  14. I had similar system and have actually removed one card as it wasn't getting me any extra fps in most games. I use a tagan 1100 turbojet.
  15. 4Ryan6 said:
    Go to the source for your information, 1000w is recommended for 2way SLI in my ASUS Crosshair II Formula, however for a 3way setup the manual defaults to the Nvidia website!

    Nvidias reccomendations:

    http://www.slizone.com/object/slizone_build_psu.html



    Just because it isnt certified doesnt mean it wont work. The Guru3d link i have uses Enermax Galaxy 1000 Watt PSU to power the tri-sli rig without an issue. Max draw "PC 100% usage (wattage gaming Peak) = 749 Watt (3-way SLI)" which would put a 1kw power supply at the 75% usage full load which would come close to max efficiency. http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story2&reid=89

    Im perplexed at why the Corsair comes up on the SLIzone link under Tri-SLI for 8800Ultras but not for GTX280 when they are almost the same power usage.
  16. chookman said:
    Just because it isnt certified doesnt mean it wont work. The Guru3d link i have uses Enermax Galaxy 1000 Watt PSU to power the tri-sli rig without an issue. Max draw "PC 100% usage (wattage gaming Peak) = 749 Watt (3-way SLI)" which would put a 1kw power supply at the 75% usage full load which would come close to max efficiency. http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story2&reid=89

    Im perplexed at why the Corsair comes up on the SLIzone link under Tri-SLI for 8800Ultras but not for GTX280 when they are almost the same power usage.


    well i guess TRI SLI really wont make much difference, from that article that u gave me, so i think ill just stick with reg-SLI...
  17. Why 2 280 GTX's then? Why not just one 280 GTX or one HD 4870 or one HD 4870X2 or one 9800 GX2? You know you can always buy one for me ;)
  18. yea i have to admit you would be much better off buying 2 4870X2 and whacking them on to a x48, not only would that be better than 3 gtx280, my guess is it would be cheaper

    i would say your gonna need a kiloWatt PSU preferably from corsair
  19. You do not need that much. you can get by with 850w. Just watch this video and go to the 8:10 mark
    http://www.youtube.com/watch?v=aPljIUueGHk
  20. the only thing is that those are expensive because of their current rating i guess.. so it probably is cheaper to go with the 1200w
Ask a new question

Read More

Power Supplies SLI Power Components Product