Problem with 7 Ult X64 Recognizing 2nd Video Card

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  1. rb504c
    Posts : 7
    Win7 Ult x64
       New #1

    Problem with 7 Ult X64 Recognizing 2nd Video Card


    I have 2 EVGA GTX570HDs, I want to run them in SLI on my XFX 790i Ultra SLI Motherboard. i have qx9650 and 4gigs of ram. I just reinstalled windows 7 ultimate clean install. But windows 7 isnt seeing the 2nd Video card. On top of that when i activate 2 monitors which ever is my primary screen ( with start menu and all) will flicker while the 2nd screen is flicker free. When i go back to one monitor ( either of them) it doesnt flicker at all.


    Full System Specs

    OS: Windows 7 Ultimate
    Version: 6.1.7600
    System Manufacture?: XFX79U
    System Model: XFX 790i Ultra SLI
    System Type: x64
    Processor: Intel Core 2 Extreme CPU X9650
    BIOS: Version Phoenix Technologies LTD P09 10/26/2009
    SMBIOS: 2.4
    Installed Physical Memory 4.00 GB
    Graphics: Nvidia Geforce GTX 570
    Sound: 4x Nvidia HD Audio, 1x Realtek HD Audio
    HDD: OCZ Vertex 2 SSD 120GB
    Last edited by rb504c; 10 Mar 2011 at 12:04.
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  3. Maguscreed
    Posts : 6,668
    Windows 7 x64
       New #2

    Are you certain you meet the power requirements for 2 570's?
    Also is the sli bridge connected solidly.
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  4. rb504c
    Posts : 7
    Win7 Ult x64
    Thread Starter
       New #3

    The SLI Bridge is attached and is on firmly. The Power Supply is a 1200W Single Rail Silverstone Power Supply Gold Rated.

    Device manager isnt even recognizing theres a 2nd Video card at all
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  6. sygnus21
    Posts : 7,683
    Windows 10 Pro
       New #4

    Sir your issue is not a "Windws 7" issue per se but eithier a driver or hardware issue. Windows 7 is more than capable of allowing SLI/Crossfire configurations to run.

    You need to check that the second card is working, the drivers are properly configured, the card is properly fitted in the slot, and that the card is getting power.
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  7. rb504c
    Posts : 7
    Win7 Ult x64
    Thread Starter
       New #5

    sygnus21 said:
    Sir your issue is not a "Windws 7" issue per se but eithier a driver or hardware issue. Windows 7 is more than capable of allowing SLI/Crossfire configurations to run.

    You need to check the the second card is working, that the drivers are properly configured, that the card is properly fitted in the slot, and that the card is getting power.

    Both Cards are getting power. I Tested both card individually in the one slot. I also test the slot the im using the 2nd video card in by inserting a x8 PCIe Raid card from Promise in it. Boots up and is recognized. So its not the motherboard or the video cards. both cards are getting 4 seperate 6 pin cables straight from the power supply.

    This is a windows issue not a driver issue. its a fresh install.
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  8. Maguscreed
    Posts : 6,668
    Windows 7 x64
       New #6

    If it was a windows issue there would be hordes of people with your card configuration complaining.

    You are actually the first I've seen with this problem.

    I ran to xfx's website to check on your board model and the first thing I saw when attempting to log in was
    IMPORTANT MESSSAGES


    The XFX AMD Catalyst has been updated to version 11.2 please login to see if this is recommended for your card.
    The XFX Nvidia Driver has been updated to version 258.96 please login to see if this is recommended for your card.
    The XFX HD Audio Driver has been updated to R2.53 please login to see if this is recommended for your Mainboard.
    We recommend updating the BIOS on your XFX Nforce 790i SLI ( MB-N790-IUL9 ) to version P09.
    We recommend updating the BIOS on your XFX Nforce 780i SLI ( MB-N780-ISH9 ) to version P08.
    We recommend updating the BIOS on your XFX Nforce 750a SLI ( MD-A72P-7509 ) to version 1.7.
    We recommend updating the BIOS on your Nforce 680i LT ( MB-N680-ILT9 ) to version P08.
    We recommend updating the BIOS on your Nforce 680i SLI ( MB-N680-ISH9 ) to version P33.
    We recommend updating the BIOS on your Nforce 650i Ultra ( MB-N650-IUL9 ) to version P05.

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  10. bassfisher6522
    Posts : 2,240
    Windows 7 Ultimate 64 bit
       New #7

    Check your refresh rates for both monitors and try switching the refresh rate of the monitor that's flickering.
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  11. sygnus21
    Posts : 7,683
    Windows 10 Pro
       New #8

    I would suggest the OP fill in his full system specs.

    Please see this tutorial on filling out system specs as well as my How To Ask For Help guide.
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  12. rb504c
    Posts : 7
    Win7 Ult x64
    Thread Starter
       New #9

    Full System Specs

    OS: Windows 7 Ultimate
    Version: 6.1.7600
    System Manufacture?: XFX79U
    System Model: XFX 790i Ultra SLI
    System Type: x64
    Processor: Intel Core 2 Extreme CPU X9650
    BIOS: Version Phoenix Technologies LTD P09 10/26/2009
    SMBIOS: 2.4
    Installed Physical Memory 4.00 GB
    Graphics: Nvidia Geforce GTX 570
    Sound: 4x Nvidia HD Audio, 1x Realtek HD Audio
    HDD: OCZ Vertex 2 SSD 120GB
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  13. sygnus21
    Posts : 7,683
    Windows 10 Pro
       New #10

    rb504c said:
    Full System Specs

    OS: Windows 7 Ultimate
    Version: 6.1.7600
    System Manufacture?: XFX79U
    System Model: XFX 790i Ultra SLI
    System Type: x64
    Processor: Intel Core 2 Extreme CPU X9650
    BIOS: Version Phoenix Technologies LTD P09 10/26/2009
    SMBIOS: 2.4
    Installed Physical Memory 4.00 GB
    Graphics: Nvidia Geforce GTX 570
    Sound: 4x Nvidia HD Audio, 1x Realtek HD Audio
    HDD: OCZ Vertex 2 SSD 120GB
    Thanks but when this thread moves to another page your system specs will be hidden/lost. That's why I posted this..... Please see this tutorial on filling out system specs

    And you might want to visit some of the Nvidia forums to see if your issue has been reported there and a solution found.
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