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    Why is HDMI connected to integrated and not dedicated?

    Discussion in 'Gaming (Software and Graphics Cards)' started by Cubed, Aug 13, 2012.

  1. Cubed

    Cubed Notebook Consultant

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    HDMI 1.4 is capable of some high-resolutions beyond 1080p just like Displayport and lots of laptops now have HDMI 1.4

    So I want to connect a laptop to a big 27" 2560x1440 monitor which is getting more and more common now but you can't! Why?

    The HDMI connection seems to be connected to the integrated Intel graphics chip which will not go up to 2560x1440, but the dedicated nVidia GPU can! So why on earth is the HDMI port not connected to the dedicated GPU?!

    This is so frustrating because I am having to spend much more money on a laptop I don't really want/need just for the sake of a Displayport to overcome the resolution problem.
     
    Cubed, Aug 13, 2012
    #1
  2. DEagleson

    DEagleson Gamer extraordinaire

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    Guess its because of Optimus.

    Sent from my GT-I9300 using Tapatalk 2
     
    DEagleson, Aug 13, 2012
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  3. PaKii94

    PaKii94 Notebook Virtuoso

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    i believe this problem is also valid for amd (enduro) also
     
    PaKii94, Aug 13, 2012
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  4. MegaBUD

    MegaBUD Notebook Evangelist

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    wait what? i play that Wii emulator on my tv and with the HDMI pluged in...and it does use the gpu... no?

    Pretty sure the IGP can push that many fps...
     
    MegaBUD, Aug 14, 2012
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  5. davidricardo86

    davidricardo86 Notebook Deity

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    I've noticed this. When connected via hdmi to my 1080p hdtv, it uses the 6620g instead of the 7450m. I too would like to know why that is?

    Sent from my SPH-M580 using Tapatalk
     
    davidricardo86, Aug 14, 2012
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  6. jinda

    jinda Notebook Evangelist

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    Not sure but I play on an external monitor thru HDMI and I get the dGPU running and get the FPS of the dGPU.
     
    jinda, Aug 14, 2012
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  7. DEagleson

    DEagleson Gamer extraordinaire

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    Its not that the OP has issues doing 1080p over HDMI but that it wont do resolutions over 1920x1080.
    I dont know what Intel offers as the maximum resolution but it would be the main limitation of Optimus / Enduro setups.
     
    DEagleson, Aug 14, 2012
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  8. R3d

    R3d Notebook Virtuoso

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    It's because everything goes through the iGPU. Your laptop's internal display is connected to the iGPU too. Otherwise, you wouldn't be able to use HDMI using just the integrated graphics.
     
    R3d, Aug 14, 2012
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  9. HTWingNut

    HTWingNut Potato

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    Intel's limit is due to single link digital HDMI and DVI which is 1920x1200. You would need dual link capability on both the GPU, monitor, and respective ports. Displayport/VGA will do up to 2560x1600, however.

    Most Optimus / Enduro or "software" switchable graphics route directly through the integrated GPU and the iGPU is used to display the image from the dedicated. Even if it's muxed for manual switching, the port would have be set up for dual link too.
     
    HTWingNut, Aug 15, 2012
    #9