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How to run GTX 780 with 3 monitors @ 144Hz (DP->DVI?)

Discussion in 'Sim Racing Hardware' started by Marcel Offermans, Jan 5, 2014.

  1. I recently bought a system with a GigaByte graphics card with GeForce GTX 780 [1] and three BenQ XL2411T monitors that do 1920x1080 at 144Hz.

    The graphics card has 4 outputs: 2xDVI, 1xHMDI and 1xDP.

    The two monitors that are connected via DVI can both be run at 144Hz.
    The third monitor that is now connected via HDMI can only be run at 60Hz.

    I am using this system with a triple screen setup (for racing simulations) and as soon as I make a “combined” screen with the nvidia software, that whole screen becomes 60Hz. Not a surprise, since it has to adapt to the slowest of the three screens.

    I know I probably need to connect the third monitor using a DP->DVI adapter to go to 144Hz, but I’m not sure what adapter to get. I don’t care about 3D modes, 2D is just fine, but I would like to have that at 144Hz. Is that possible, and if so, what adapter do I need (an active or passive one, and which specific model)?
     
  2. Last edited: Jan 5, 2014
  3. Colin J. Fleming

    Colin J. Fleming
    Premium Member

    hi Marcel
    you need an active displayport to DVI adapter to get all screens 144hz, there are only a handful adapters on the market that i know will work, i got this information from the iracing hardware forums, great help there for tripple screen at 120hz, if your a member you should check there before you buy anything.

    Accell B087B-007B DisplayPort/Mini DisplayPort to DVI-D Dual-Link Adapter with 3D Support
    http://www.accellcables.com/products/DisplayPort/DP/dp330_dvid.htm

    Club 3D - CAC-1050 - UltraAV DisplayPort to Active DVI Dual-Link
    http://www.club-3d.com/index.php/products/reader.e...ctive-dvi-dual-link-cable.html

    -Club 3D - CAC-1051 - UltraAV DisplayPort to Active DVI Dual Link 330MHz cable
    http://www.club-3d.com/index.php/products/reader.e...hz-stereo-3d-gaming-cable.html

    im using 120hz monitors but im i sure these will work with 144hz monitors



    i ordered the CAC-1051 from amazon last week but im still waiting for it to arrive,
     
    • Beer Beer x 1
  4. Rupe Wilson

    Rupe Wilson
    Keep Yoga real Premium Member

    I use the Ben Q 24" 120htz monitors with a Titan card and use the Display port and 2 DVI conenctors and all 3 screens runs 120htz
    this is possible because the benQ screens have the display port to display port already in them so the adapter is not needed, :)
     
  5. Colin J. Fleming

    Colin J. Fleming
    Premium Member

    i have ben q monitors too, but have not got a displayport on them, wish i had would of saved me spending 160euro on
    that bloody adapter:(
     
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  6. Well, BenQ sells a lot of different models of their 24" monitors. I have the XL2411T [1] which does not come with a displayport. A newer model, the XL2420T [2] does come with a displayport so that would save you an adapter. The catch? At least in The Netherlands, the XL2411T is 265 euros whereas the XL2420T is 345. For triple screens that 3 x 80 = 240 euros more expensive, so still a lot more expensive than an active adapter (unless you mix different monitors, but I am guessing most people want to have 3 identical ones). I managed to get a second hand Accell B087B-007B which I hope will arrive in the mail this week. As soon as I've verified this works as expected, I will follow up here. In the mean time, thanks for all the feedback!

    [1] http://www.benq.com/product/monitor/xl2411t/
    [2] http://www.benq.com/product/monitor/XL2420T/
     
  7. Following up, this works as expected. The only downside is that the display gets some snow/static if you switch from 60 -> 144 Hz. A reboot fixes that and if you have your desktop and all your games at 144 Hz the problem does not occur. Again thanks all for the help!