LAB501

eGPU – Connecting an external video card to a notebook (DIY implementation)

What about PhysX? Well, in case of games it is possible to dedicate the internal dGPU for PhysX and use the eGPU for graphics only as long as the dGPU is powerful enough to do that. Of course, the dGPU must be also a Nvidia card, AMD cards won’t work, and neither iGPUs (Intel Integrated video cards).

Setting the primary display we are ready to run some benchmarks to see how the external GPU compares to the mobile mainstream GPU (765m) inside the notebook. As you can see the performance almost doubles compared to what we could get without the eGPU.

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7 comments la: eGPU – Connecting an external video card to a notebook (DIY implementation)

    1. So you left out the most important information, the penalty of thunderbolt/usb3 and the memory buffering. The most important reasons you see few/no such implementations in the wild.

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    2. Compared to desktop, yes. Compared to the dGPU in the laptop…you can see the graphs…

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    3. Awesome stuff Monstru! Like it 🙂 Now I want to attach this to my MacBook Pro Retina and do some 3k gaming on it 😀

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    4. Glad you like it, I hope it helps a lot of users 😀

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    5. Great work!!! Would it be possible to run the pcie with a powered riser? The Sonnet Board needs still be powered, right? Possible to power it through PSU? Thanks

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    6. Joseph wrote on:

      I don’t know whether or not I should be posting this here, but I’m having a problem with an egpu unit, when ever I attatch it to my laptop and boot up (either with or without the drivers) my laptop screen on boot up goes to a GPU fail screen (multicoloured and pixelated). I’ve yet to find anyone else with the same problem and from my testing I’ve yet to find a solution :'( .

      If anybody could help me solve this problem I would be over the moon 🙂

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    7. What a great explanation. Thanks! From the moment I saw the bandwidth of thunderbolt I knew this would be possible and I am sure there is a commercial market for it. Meanwhile, hopefully more and more enclosures come out with boards which can help make this easier still.

      …and sure, it won’t beat a desktop with the same GPU, but it gives you the chance to have an ultra portable with desktop class graphics which is also upgradable! Brilliant!

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