Nvidia G-Sync hack - it works on every display supporting DisplayPort 1.2

Discussion in 'Gaming (Software and Graphics Cards)' started by Marecki_clf, Jan 28, 2015.

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  1. Razyre

    Razyre Notebook Evangelist

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    So my friend tried it on his Retina Macbook Pro under Windows (Yes, a GT650M XD). The driver installed and he got the option for G-SYNC. Opens the demo, works fine, when he clicks the "G-SYNC" tickbox the monitor starts to go schizo. Apparently it can work for like 10 seconds but after that the monitor just gives up and restarts.

    This is a 2013 Retina Macbook Pro outputting to a Dell U2713HM over Displayport 1.2. Now the fact that the monitor was freaking out suggests to me that it was indeed experiencing some sort of frequency change but it just didn't like it.

    The eDP displays in these notebooks are direct links from the MXM module so it's more viable for it to work, ESPECIALLY since AMD's original Freesync demo ran on a modded notebook and it's common knowledge that VBLANK has been supported on certain notebook displays for some time. Now it could be that these GT72s or whatever with LG eDP displays support VBLANK. I would not be surprised if many of the others that tried it have LVDS displays which it plain doesn't work with, there are apparently issues with SLI notebooks (whether or not it matters if you have one or two GPUs enabled I don't kn0w). Optimus doesn't work because you go through the Intel adapter to get to the screen (hence why Optimus is ****ing awful and notebook vendors should stop using it).

    I really, really want to try this on my LG 27EA83-D but unfortunately I have an R9 290X and my laptop with a 650M only has VGA/HDMI out so no luck there. Other PC in my house uses a 7950.

    I'm really beginning to wonder if this is true and it's being downplayed by people in the review realm because they can't believe that Nvidia would outright lie about G-SYNC. I mean the fact that no one calls out Nvidia on the fact that Freesync works perfectly with a simple firmware tweak to a standard monitor irks me.

    Now of course the official modules are probably a means of Nvidia controlling the product pipeline and making sure there is a guarantee the monitor is going to work; as the Macbook example shows, and the complete variance in success from different people with different configs, there is a high likeliness that a normal setup won't work. But that doesn't mean that the module is required for the function, I'm calling serious ******** on that.

    I can't believe no one with a desktop has tried this yet. Tonnes of people with 970s/980s and surely some of them have DP 1.2 monitors, particularly LG.
     
  2. R3d

    R3d Notebook Virtuoso

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    Someone over at OCN got this to work (link). Maybe this is actually legit? :eek:
     
  3. James D

    James D Notebook Prophet

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    It won't work on 1.2 DP external monitors due to different firmwares.

    Just rare DP monitors and some eDP panels.

    Could you post a smartphone video with Macbook?
     
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  4. octiceps

    octiceps Nimrod

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  5. jaybee83

    jaybee83 Biotech-Doc

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    ah well ok... lucky me im a 15inch fanboy :p
     
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  6. Marcelosiciliano

    Marcelosiciliano Notebook Consultant

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    My GT72 has the LG display. Are you sure this will work? Is there a chance of this drivers screwing my 980m?
     
  7. octiceps

    octiceps Nimrod

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    It will work if you have the IPS screen. The only issue is your GPU will not be overclockable, same as with any other R347 driver.
     
  8. Cakefish

    Cakefish ¯\_(?)_/¯

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    I tried NVIDIA's G-SYNC Pendulum demo out of curiosity. 40-50fps was far less smooth than 60fps (obviously) but strangely I noticed no discernible difference in smoothness with V-SYNC enabled or disabled (except the introduction of screen tearing with it turned off, of course). Very strange, but this is not the only time that I have noticed this behaviour... maybe Intel already has a sort of adaptive V-SYNC built into the drivers?
     
  9. James D

    James D Notebook Prophet

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    No. It will work if GT72 has 9xxm or 980m only. Newbie from France claims it worked in owner's lounge.
    no. he edited post and now I see it's, not TN as he claimed before
    I can't play with 45-58 fps when triple buffering vsync. Only 60 fps is super fluid.
     
  10. octiceps

    octiceps Nimrod

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    Adaptive-Sync =/= Adaptive V-Sync

    What you are seeing is triple buffered V-Sync, not variable refresh. Perhaps you did not pick up on the visual judder that is a telltale sign of V-Sync.

    Ah. I forgot GT72 also came with 880M. But he does have 980M.
     
    Last edited: Jan 30, 2015
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