Windows 8 and 8.1 Forums


Using Onboard Video & Video Card w/2 Monitors

  1. #1


    Posts : 43
    Windows 8.1 64-bit

    Using Onboard Video & Video Card w/2 Monitors


    I just bought a new 27" monitor, should be delivered Monday. On my desktop system I currently have a 24" monitor which I'll pair with my new monitor. I have an nVidia GeForce 8600 GT video card with 512 MB memory, one DVI port and one VGA (d-sub) port. I have a Gigabyte GA-Z77X-UD3H motherboard with onboard video and a DVI port. I have 4 gigs RAM, core i5 cpu, running Win 8.1 64-bit. I do not play games on this system.

    Eventually I'll get a new video card with two DVI ports but that will be a while yet. Until then, rather than use the video card for both monitors, which means one would be on DVI and one VGA, would it be better to put one monitor on the video card DVI port and the other on the motherboard onboard video DVI port?

    Also, if I do this, how much memory should I allocate to the onboard video? Options are 32 MB to 1024 MB.

    Thanks!

    Edit: Just to be clear, I'm pretty sure my mb will allow this. What I'm really wondering is if this will give me a better display on the secondary monitor using dvi rather than vga connection.
    Last edited by hcour; 20 Apr 2014 at 13:26.

      My System SpecsSystem Spec

  2. #2


    Cheshire, UK
    Posts : 66
    Windows 7 Ultimate 64x /Windows 8 Professional 64x


    Quote Originally Posted by hcour View Post
    I just bought a new 27" monitor, should be delivered Monday. On my desktop system I currently have a 24" monitor which I'll pair with my new monitor. I have an nVidia GeForce 8600 GT video card with 512 MB memory, one DVI port and one VGA (d-sub) port. I have a Gigabyte GA-Z77X-UD3H motherboard with onboard video and a DVI port. I have 4 gigs RAM, core i5 cpu, running Win 8.1 64-bit. I do not play games on this system.

    Eventually I'll get a new video card with two DVI ports but that will be a while yet. Until then, rather than use the video card for both monitors, which means one would be on DVI and one VGA, would it be better to put one monitor on the video card DVI port and the other on the motherboard onboard video DVI port?

    Also, if I do this, how much memory should I allocate to the onboard video? Options are 32 MB to 1024 MB.

    Thanks!

    Edit: Just to be clear, I'm pretty sure my mb will allow this. What I'm really wondering is if this will give me a better display on the secondary monitor using dvi rather than vga connection.
    Hi hcour, you cannot use 2 GPU's to power 2 different monitors unfortunately, you can have 2 sound cards and 2 input devices but graphics cards are not something you can duplicate unless they are the same cards, you can use something called hybrid SLI if your onboard GPU is also nvidia but it won't use both monitors. Best option is to VGA and DVI them.
      My System SpecsSystem Spec

  3. #3


    Sydney, Nova Scotia, Canada
    Posts : 6,490
    Windows 10 Education 64 Bit


    For that to work, I do believe your motherboard has to support Hybrid SLI. If it doesn't the onboard will shut off as soon as a discreet video card is detected. I've used VGA and DVI on the same monitor and didn't notice any difference. If it was me I'd put them both on the 8600 GT.
      My System SpecsSystem Spec

  4. #4


    Posts : 406
    W10 Pro X64


    If your system supports it, you will have settings in your bios to enable Integrated Graphics multi monitor, or something to that effect

    Click image for larger version
      My System SpecsSystem Spec

  5. #5


    Posts : 35
    Windows 8.1 pro 64 bit


    The only practical difference between the DVI and VGA signals (other than the audio capacity of DVI) is that VGA, being analogue, can be degraded by poor cable quality or very long runs of cable. The DVI signal, being digital, will either work perfectly or not at all.

    I would just put the second monitor on the VGA cable - it will be fine.
      My System SpecsSystem Spec

  6. #6


    Sydney, Nova Scotia, Canada
    Posts : 6,490
    Windows 10 Education 64 Bit


    Quote Originally Posted by drteeth View Post
    The only practical difference between the DVI and VGA signals (other than the audio capacity of DVI) is that VGA, being analogue, can be degraded by poor cable quality or very long runs of cable. The DVI signal, being digital, will either work perfectly or not at all.

    I would just put the second monitor on the VGA cable - it will be fine.
    This is going to sound like nit picking but DVI doesn't carry audio, its video only. HDMI does video and audio though.
      My System SpecsSystem Spec

  7. #7


    Posts : 35
    Windows 8.1 pro 64 bit


    Alphanumeric:

    Oops
      My System SpecsSystem Spec

  8. #8


    Sydney, Nova Scotia, Canada
    Posts : 6,490
    Windows 10 Education 64 Bit


    Quote Originally Posted by drteeth View Post
    Alphanumeric:

    Oops
    lol, it happens to the best of us.
      My System SpecsSystem Spec

Using Onboard Video & Video Card w/2 Monitors
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