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  1. #1
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    Question ASUS suppot from space! 2x GTX690 on P9x79 Deluxe?

    After reading in a lot of different forums, I just
    got more and more confused about this question:

    Will ASUS P9X79 Deluxe support 2x GTX690?
    No one seems to agree on this, so I thought I was
    better off sending the question to ASUS Support:


    [Problem Description]
    I just want to know if I can use 2 GTX690 in P9x79 Deluxe

    Answer from ASUS Support:

    Sorry for the inconvenience.
    In theory,you can install 2 GTX 690 video cards on this P9X79 DELUXE video cards,if possible,I also suggest you to have a check with the Nvidia.


    My reply:

    Hi there Carter!

    In theory? What kind of answer is that? I
    need to talk to someone who actually know
    what they are talking about please!

    To ask nVidia is the strangest suggestion I
    have heard. I`m asking if the ASUS P9X79
    can handle and make use of two GTX690
    or not, It`s your product! I`m thinking of
    building an actual computer, not a theoretical
    one!

    I need a follow-up to this question please!

    Cheers from Eagleizer



    If somone else can give me a convincing
    explanation to why 2 GTX690 will work on
    this board or not, I`ll be very happy
    New system (not installed yet):
    3960x, GTX690, P9x79 Deluxe,
    Samsung 500GB SSD 840,
    HC-500 Water Chiller.
    Still to buy:
    32GB RAM, , 120GB SSD
    Old rig:
    Lapped QX9650@4.7GHz 1.58v 24/7 for 5 years. Temp
    82C+ :P . G.Skill Ripjaws 4x4GB, Maximus Formula SE (died dec. 2012)

  2. #2
    ROG Guru: Grand Master Array
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    The GTX 690 is Dual-GPU card. So technically when you're doing a SLI GTX 690, it'd seem like you're really doing a QUAD SLI. But that is not the case because in reality the GTX 690 is only using one PCIe lane. So 2 GTX 690 would use 2 PCIe lanes making it a SLI. And since the P9X79 Deluxe supports up to 3 way SLI, it'll have no problem running the 2 GTX 690 in SLI.

  3. #3
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    Thanks for your reply!

    I`m still not convinced, as support from ASUS, EVGA
    and nVidia says NO. But the answer from support on
    all 3, had the same technical "sting" as the one from
    ASUS. I have asked all 3 for a more technical argument
    to why this would not work.

    From the spec list at ASUS website:

    P9x79 Deluxe:
    Supports NVIDIA® 3-Way SLI™ Technology
    Supports AMD Quad-GPU CrossFireX™ Technology

    P9x79:
    Supports NVIDIA® Quad-GPU SLI™ Technology
    Supports AMD Quad-GPU CrossFireX™ Technology

    RAMPAGE IV EXTREME:
    Supports NVIDIA® 4-Way SLI™ Technology
    Supports AMD 4-Way CrossFireX Technology

    Notice the difference?

    Why does it say 3-Way SLI for SLI and
    Quad-CPU for CrossfireX on Deluxe ,and
    Quad-GPU SLI and Quad-GPU CrossFireX
    on the non-Deluxe version?


    The 4-Way and Quad-GPU term are still making me
    confused, as it seems that they depend on different
    technologys. I also read somewhere that the PEX chip
    on the GTX690 makes in unnessesary for the MB to
    support Quad-GPU. But there are so many opinions
    around on the forums, from people with lots of
    experience, that I just don`t know what to belive.

    Could it be that the PEX chip on the MB is what makes
    the board able to run 4-Way SLI or Quad-GPU? If so, it
    makes sense that the PEX on the GTX690 could do this
    job even if the MB originally dosn`t suppot it.

    Any thoughts on this while I`m wating for better
    answers from the 3 vendors?
    New system (not installed yet):
    3960x, GTX690, P9x79 Deluxe,
    Samsung 500GB SSD 840,
    HC-500 Water Chiller.
    Still to buy:
    32GB RAM, , 120GB SSD
    Old rig:
    Lapped QX9650@4.7GHz 1.58v 24/7 for 5 years. Temp
    82C+ :P . G.Skill Ripjaws 4x4GB, Maximus Formula SE (died dec. 2012)

  4. #4
    iron man Array kkn's Avatar
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    1 690 is a sli in it self, so if you add a second 690 it will be quad sli.
    you can end up using just 3/4 of the 2 cards in sli if your going quad so to say.
    or worst senario you may end up whit problems ( no guarantee so ).
    this is on the delux.

    but the other 2 mobo's suports quad sli ( 2 x 690's in sli )

  5. #5
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    Thanks for your reply, but here we go again:

    As far as I know, there is nothing called Quad SLI.
    Only Quad-GPU and 4-Way SLI. So what do you
    mean by Quad SLI?

    And:
    What is 4-Way SLI compared to Quad GPU?
    There is clearely a difference when you look
    at the specs for the different MB`s in my
    last post... .. Unless ASUS are inconsistent
    with the use of naming...

    What do you know about the PEX chip and what it does
    in the cenario of two GTX690?

    Why Deluxe:
    The reason I want the Deluxe, is all the features/slots
    I need: Soundcard, MIDI card, SATA Card, tons of USB
    devices (2 and 3), WiFi, BlueTooth , SSD Cache and so
    on. .. .. and maybe the possibility to run two GTX690...

    Your post does not address why the MB would see
    the two cards as "Quad SLI", so I`m still in the dark
    here

    I need some facts, preferably with links to some
    tech stuff...

    Cheers
    New system (not installed yet):
    3960x, GTX690, P9x79 Deluxe,
    Samsung 500GB SSD 840,
    HC-500 Water Chiller.
    Still to buy:
    32GB RAM, , 120GB SSD
    Old rig:
    Lapped QX9650@4.7GHz 1.58v 24/7 for 5 years. Temp
    82C+ :P . G.Skill Ripjaws 4x4GB, Maximus Formula SE (died dec. 2012)

  6. #6
    ROG Enthusiast Array Radiant mind's Avatar
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    The answer to your question is yes it will support two GTX690s in SLI meaning the OS will be aware of all 4 GPUs. You just can't do something like 4x GTX680s. You are doing a 2-way SLi because you are using 2 PHYSICAL cards.

    When it says 3-way, it means you can have 3 nvidia physical cards bridged or SLI Since GTX690 is a SLI within itself, you are only making one bridge between the two cards and its technically a 2-way SLI.

    So yes, you will see all 4 GPUs with 2x 690s. If you had 4x 680s, this would not work.
    i7-3820 @ 5.0Ghz - RIVF - 32GB Kingston @1866 - Gigabyte Radeon 7970 x2 - Cosair Force GT 240GB x2 (RAID 0) - WD 2TB 7200 (RAID 1)

  7. #7
    ROG Enthusiast Array Radiant mind's Avatar
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    In other words, Chino is exactly right.
    i7-3820 @ 5.0Ghz - RIVF - 32GB Kingston @1866 - Gigabyte Radeon 7970 x2 - Cosair Force GT 240GB x2 (RAID 0) - WD 2TB 7200 (RAID 1)

  8. #8
    ROG Guru: Green Belt Array KPRage PC Specs
    KPRage PC Specs
    MotherboardMaximus V Gene
    Processor3570k
    Memory (part number)Vengance 1866 8Gb Ram
    Graphics Card #1Zotac GTX 1070 Mini
    Graphics Card #2ASUS R9 280 DC2
    Graphics Card #3Radeon 5850 HD
    MonitorASUS VZ27AQ
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    Please go through the following links to clear your doubts:
    http://www.xbitlabs.com/articles/gra...x-690-sli.html
    http://hexus.net/tech/reviews/graphi...rround/?page=5

    Hope this helps. Go through the specs in the first link. You may get an idea about the confusion.

    Cheers,
    KP
    CPU: Intel i5 3570k OC'd to 4.6GHz @1.170V; Mobo: MVG; GPU: Zotac 1070 mini OC'd to +210MHz/+205MHz; Memory: 8GB (2X4GB dual channel) Corsair Vengeance 1333Mhz 9-10-9-T2; SSD: Samsung 840 pro; HDD: 1TB WD Green 6Gbps; PSU: Corsair GS 600w; Case: Bitfenix Merc Alpha:Hybrid Octane in progress; Cooler: Corsair H80 closed loop cooling @ high profile;

    Pre & Post Build Guide

    A lot of epic FAIL videos are made before one epic WIN video is made

  9. #9
    ROG Guru: Grand Master Array
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    The guys from the HEXUS review posted by KPRage used a P9X79 PRO which is supports
    Supports NVIDIA® 3-Way SLI™ Technology
    Supports AMD Quad-GPU CrossFireX™ Technology
    The P9X79 DELUXE also supports
    Supports NVIDIA® 3-Way SLI™ Technology
    Supports AMD Quad-GPU CrossFireX™ Technology

  10. #10
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    Thank soooo much guys!

    It`s friday night here in Thailand, so I`ll have to read
    all the links tomorrow. But I now feel confident that
    the Deluxe will support two GTX690! I got this, 20 min.
    ago from EVGA support:

    Answered By Dominik (EVGA)
    "I have to apologize for the lag of information at this end. Three way SLI
    boards can support Quad SLI, (TSR: Quad- GPU) at the following link
    you can find officiall information about this from NVIDIA. When you go
    to the second page there are motherboards listed that will work, the FTW 3
    and some other EVGA three way SLI boards are listed there.

    http://www.geforce.com/optimize/guid...d-sli-system#2

    Under the picture of the fan is at the right site a Next button, this will direct you
    to the motherboard list. The article is designed for GTX 590 but will
    also work with 690. Please let me know if there are any further question
    about this."

    (TSR= Tread Starter Remark)

    Thank you all for helping out!

    And Chino: You where right! (Like many others )

    Cheers from Eagleizer



    P.S. I`ll be back with the answers from the other vendors
    and how it goes with this build. I`m going to run this with
    a water chiller that chills the water to about 4 C. You might
    not think it matters, but here, in Thailand, it does.. I also
    run 3 screen setup (5040x1050) on a Matrox TH2Go.

    Indoor temp: 27,9C (need I say more.. )
    New system (not installed yet):
    3960x, GTX690, P9x79 Deluxe,
    Samsung 500GB SSD 840,
    HC-500 Water Chiller.
    Still to buy:
    32GB RAM, , 120GB SSD
    Old rig:
    Lapped QX9650@4.7GHz 1.58v 24/7 for 5 years. Temp
    82C+ :P . G.Skill Ripjaws 4x4GB, Maximus Formula SE (died dec. 2012)

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