Artifacts on the display - video chip overheating?

Discussion in 'Apple and Mac OS X' started by MrBoxster, Oct 30, 2018.

  1. MrBoxster

    MrBoxster Newbie

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    Hello!

    Macbook Pro 13 2017, the minimum configuration without a touchbar.

    When I export photos in Lightroom, the processor is loaded to the limit and the fans rotate at maximum speed, but I understand that this is normal. However, I found one problem - if during the export of photos I switch between them, then some artifacts are displayed, which disappear after some time - about 1-3 seconds.

    I’m pretty sure that the video chip is to blame for this, because the problem disappears if you disable “Use a graphics processor” in the Lightroom settings.

    Also, a gray screen appears periodically with noises in the form of grain literally 0.1-0.5 seconds when the laptop is turned on (exit from sleep mode), but not always, but in about 15-30% of all cases. Unfortunately, no photo

    The laptop is still under warranty. Is this a production defect? Do I need to carry on the diagnosis or is it in the order of things?
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  2. Danishblunt

    Danishblunt Notebook Prophet

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    Sorry but this is caused by the fact that you have no real GPU. You only have a poor integrated graphics GPU.

    The issue you're having is simply caused by the fact that you are out of RAM. iGP uses RAM as vram, once RAM is fully used, you have no vram to render pictures.

    Macbooks are not meant to do video or photo editing. The performance is way to lackluster for modern programs.
     
    MrBoxster likes this.
  3. Mobius 1

    Mobius 1 nͫٴiͤٴcͫٴeͤ੮Һ૯ ცɿ૭ ૭คעٴٴٴٴٴٴٴٴٴٴٴٴٴٴٴٴٴٴٴٴٴٴ⎬⎛⎝⎠⎞⎨

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    Before anyone says "igpu vram is shared with system ram."

    MBPs actually use Iris iGPUs (I wish I can get this on regular ultrabooks, and is the reason why I want to buy an mbp13tb) which have eDRAM and acts like VRAM for the iGPU, guess with photoshop the eDRAM isn't enough to contain all the computational data and this happens :|

    Basically like a really large cache on the CPU, compared to system ram it's much faster. I guess the corruption above results from the speed disparity.
     
  4. Danishblunt

    Danishblunt Notebook Prophet

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    You clearly do need to read up how it works. Intel Iris does share with system ram as usual, but uses the (in ops case) 64MB dRAM as cache, hell even haswell CPU's used dRAM as L4 cache.

    The iris can take up to 1536MB system ram if allowwed:
    https://support.apple.com/library/c...pro-apple-menu-about-this-mac-system-info.jpg

    So as mentioned, simple lack of ram here.

    source

    So yeah, iGPU vram is shared with system ram wheter you like it or not.
     
  5. Mobius 1

    Mobius 1 nͫٴiͤٴcͫٴeͤ੮Һ૯ ცɿ૭ ૭คעٴٴٴٴٴٴٴٴٴٴٴٴٴٴٴٴٴٴٴٴٴٴ⎬⎛⎝⎠⎞⎨

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    oops xd
     
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