2x EVGA GeForce 7900GTX SLI recommend a good psu?

Discussion in 'Videocards - NVIDIA GeForce' started by SaintEpsilon, Mar 11, 2006.

  1. SaintEpsilon

    SaintEpsilon Member

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    2 x Ati Radeon 4870X2
    Hello :)
    Long time lurker first time poster ..
    I'm thinking of getting 2 gtx 7900 cards and i'm wondering what kind of psu to get? I have an Athlon 64 4800+ CPU 4 ram blocks, and have to be sure they will have enough juice :) so any suggestions would be greatly appreciated.
    :speed:
     
  2. Cadoam

    Cadoam Master Guru

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    Looking at some power supplys at newegg.... I found this SLI ready 650 Watt powersupply... I'm sure it'll power that beast of a computer, I'd read some reviews on it through this link and see if you like it, $140 too, better then alot i've seen :) http://www.newegg.com/Product/Product.asp?Item=N82E16817159056
     
  3. MikeMK

    MikeMK Ancient Guru

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    Take a look at this list. Any of those would do, and I would say be VERY careful with PSU's for such high end cards. Even ones rated at up to 600/650 watts by good known brands have recently had problems keeping up with high end SLI rigs.

    http://www.slizone.com/object/slizone2_build.html#certified_powersupplies

    BTW, I have a EPSILON FX700-GLN 700W arriving on monday. Just starting to see a few signs of underpower on my Enermax, and for the money thats the best PSU I could find. 4x15amp rails (60amp max) looks tastey :D
     
  4. JxL

    JxL Ancient Guru

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    AMR FirePro Dual D500
    OMG 700w !? :eek: !! didnt know they come that big :D
     

  5. Cadoam

    Cadoam Master Guru

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    I saw something on newegg saying 1 kilowatt of power! on the right side of newegg on an advertisement.. so I think theres Higher :)
     
  6. stromchin

    stromchin Master Guru

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    Hi guys, I didn't want to open a new thread just for one question, and since you're talking here about power supplies...

    mine is a 430 W and it has
    +12V 14A
    and +12V 15A
    does this mean it has 29 A on the +12V rail?
    Should this be enough for a 7900 GTX without SLI?
    I'm using it with a 6800 GS right now and is giving me no problems
     
  7. JxL

    JxL Ancient Guru

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    well for a 6800GS a 370w doesnt give me problems either. 7900 is a bit step ahead though, so a more powerful PSU will be needed.
     
  8. SaintEpsilon

    SaintEpsilon Member

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    Cheers! thats a monster of a psu and generally good reviews, thanks alot.
     
  9. robotman

    robotman Master Guru

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    700w very rare go for 680w antec
     
  10. ergon133

    ergon133 Member

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  11. MikeMK

    MikeMK Ancient Guru

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    Yup, the Seasonic is a very good PSU no doubt about that.
     
  12. kwak

    kwak Ancient Guru

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    seasonic is one of the best psu's there are, and that tagan is awesome mike.
    but why dont you go with a pcp&p?
     
  13. MikeMK

    MikeMK Ancient Guru

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    The PC P&C are great PSU's but way overpriced, im not spending that much on a PSU. My enermax is just starting to show its limits when i overclock with these 7900's, but the FSP 700watt should do me fine. Looks like a very good PSU indeed. Cant moan at 60a at all, and every review ive read has said its one of the best.

    BTW, Tagan are very good too, i just build a rig around their 480watt one, very nice indeed, but the most powerful one i could see was a 580watt, so not enough for my needs im afraid.
     
  14. djt

    djt Active Member

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    SaintEpsilon,

    Here’s a link to an interesting article about the ridiculous power requirements with the new video cards-

    http://www.extremetech.com/article2/0,1697,1932958,00.asp

    I have actually experienced these problems first hand. After going through an Enermax and a PC Power and Cooling 510/SLI, I finally gave up and bought a PC Power and Cooling 1000Watt for the machine listed below (my two Evga 7900GTX’s Super Clocked should be up and running by Tuesday). I’m also going to be ordering a second 1000Watt for my ATI 1900 series Cross Fire setup.


    Asus A8N32 Deluxe/BIOS 1103
    Athlon64 X2 4800+
    Corsair TwinX2048Mb-3500LL Pro
    2x e-GeForce 7800 GTX KO ACS3 Edition
    Sound Blaster X-Fi Fatal1ty FPS
    2x WD 74Gb Raptor (RAID 0)
    2x Seagate 80Gb (RAID 0)
    Plextor Premium
    Plextor PX-716A
    PC Power and Cooling Turbo-Cool 1KW/1000W
    Silver Stone TJ03
    Windows XP Pro/SP2
     
  15. repapips2004

    repapips2004 Maha Guru

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    Leadtek A6600GT 128MB @ 500/1000
    Do you have some HIGH-END spare parts of your previous PC to give up? Damn lots of $$$ out there...
     

  16. djt

    djt Active Member

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    repapips2004,

    My Nvidia setup has been pretty much trouble free. I cannot say the same about my experiences with Cross Fire-

    http://www.planetamd64.com/index.php?showtopic=19452

    Right after I went through with the RMA process to send everything back, Asus released a BIOS on Friday that supposedly fixes the problems. My brand new A8R32-MVP Deluxe, 1900 Cross Fire Edition and 1900XTX should be on my door step in about a week so that I can try this all over again. The case got sent back for good, I cannot believe how poorly the panels fit on that thing. Pretty sad for a $365.00 case.
     

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