Dual Graphics card SLI Problem


  1. Posts : 143
    Windows 7 Ultimate 64-bit
       #1

    Dual Graphics card SLI Problem


    Hello Forum, im CrazyKilla

    I have Dual GTS 450s which work very nicely, although performance isn't too great, at first i didn't know how to enable SLI, but then i found this in NVIDIA Control Panel



    The problem is, Every time i start up my PC, i have to open up the drop box, and change from GTS 1 to GTS 2, or GTS 2 to GTS 1, then dedicate that card to PhysX, that enables SLI, but only some of the time,

    Why do i have to switch what card is Dedicated to PhysX every time i start PC to enable SLI? i know if its enabled or disabled because i have a program called TechPowerUp GPU-Z that shows if SLI is enabled, and also if SLI is enabled my gaming performance increases a lot,
      My Computer


  2. Posts : 12,364
    8 Pro x64
       #2

    So you have to reset the options every time?

    It might be worth uninstalling / re-installing the video drivers and doing a custom installation. Don't install: the updater, the 3d vision drivers, hd audio. Basically you only want the video driver and physx.

    During the process, there is an option checkbox to "Perform a clean installation" -make sure you enable that. It basically sets everything to defaults during installation.

    As for the Physx dedication - leave it to Auto.
      My Computer


  3. Posts : 2,164
    Windows 7 Ultimate 64bit
       #3

    Hook up both screens to card number 1
      My Computer


  4. Posts : 143
    Windows 7 Ultimate 64-bit
    Thread Starter
       #4

    If i put both monitors to card number 1, it pritey much just says that i only have 1 card, and doesn't allow SLI at all,
    As for the Reinstalling drivers, done, about 6 times before this post, but still hasn't fixed it,
    Ill try leave PhysX dedication to Auto and see if it keeps SLI on after restart,
    Also i did install drivers including clean isntallation about another 8 times, not fixing
      My Computer


 

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