Nvidia Optimus reduces gaming performance

Discussion in 'Gaming (Software and Graphics Cards)' started by yrekabakery, May 8, 2019.

  1. yrekabakery

    yrekabakery Notebook Virtuoso

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  2. pipyakas

    pipyakas Notebook Guru

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    Well let's take it as the trade off for not running the dGPU when not needed? Which is the entire point of Optimus
    It just sucks that most OEMs wont include the option to turn it off, probably due to difficulties in designing another pass to the display from the dGPU
     
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  3. yrekabakery

    yrekabakery Notebook Virtuoso

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    Yeah but that difference is startling at times. 256 FPS vs. 138 FPS in CS:GO is insane, and maybe for someone who plays it competitively that could be a real dealbreaker. The Optimus performance can't even get the full utility of the 144Hz panel.

    And this seems to be a recent development too. Optimus vs. non-Optimus didn't have this kind of regression prior to Turing laptops.
     
  4. hfm

    hfm Notebook Virtuoso

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    It might just be something about the implementation on this laptop.
     
  5. Ragib Zaman

    Ragib Zaman Notebook Enthusiast

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    As explained in the YouTube video, Optimus utilizes the GPU for rendering the graphics, but then still passes through to the CPU graphics for output to the monitor, introducing an overhead on the CPU. The more a game's FPS is CPU dependent, the larger the FPS difference between Optimus and G-Sync FPS will be. On one end is CS:GO, known for being notoriously CPU bottlenecked so it sees a large increase from being released from that overhead. On the other end, games which are totally GPU bottlenecked and minimally CPU dependent will experience minimal loss of FPS from incurring the Optimus overhead. Most games will typically be somewhere in the middle, with between 7% and 20% FPS gain.
     
  6. cucubits

    cucubits Notebook Evangelist

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    I'm not bothered by optimus. Asus bundled software lets you just active discrete graphics only and that's that, no more optimus. Just had to do this once and it only runs in g-sync mode all the time.
     
  7. yrekabakery

    yrekabakery Notebook Virtuoso

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    Perhaps, although it should be noted that the video creator tested both the Asus GX701 and Dell G5 and observed the same issue.

    I’m not sure if that’s the reason. AC Odyssey and Watch Dogs 2, games which are more CPU-intensive (he showed how WD2 used 100% of the i7-8750H with or without Optimus) saw less of a performance drop than DOTA 2 and CS:GO, which do not fully utilize the CPU. Ghost Recon: Wildlands should be completely GPU-bound at those settings on that setup, yet still saw a performance drop.
     
  8. Grant B Gibson

    Grant B Gibson Notebook Deity

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    I personally don't see why vendors don't go for dGPU only/iGPU only, its the best solution IMO
     
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  9. Papusan

    Papusan JOKEBOOK's Sucks! Dont waste your $$$ on FILTHY

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    iGPU only means less possibility to Clean out Your Wallet. Add in more features then charge you more:D
     
    Last edited: May 13, 2019
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  10. Grant B Gibson

    Grant B Gibson Notebook Deity

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    iGPU only is a feature I can see many people wanting, heavily increased battery life for when you don't need your dGPU active.
     
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