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    Does the lower bandwidth of the e-GPU have an effect on bitcoin mining?

    Discussion in 'e-GPU (External Graphics) Discussion' started by moral hazard, Jul 1, 2012.

  1. moral hazard

    moral hazard Notebook Nobel Laureate

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    I run bitcoin mining software on my notebook when I don't use it (just for the fun of it). With my 4870 at 640/250 1.0V I get around 75Mhash/s.

    If I connected an e-GPU, would I get the full hash rate or would I be limited by bandwidth?

    From what I understand, bitcoin mining doesn't use much bandwidth so I should have the same result as if I had the GPU running in an x16 slot.

    If this is the case, then wouldn't that then be a perfect bitcoin mining rig?

    Having the GPU outside of the system so that it can be cooled well and possibly having 2 eGPUs per notebook it should be more power efficient than having a desktop mining rig.
     
    moral hazard, Jul 1, 2012
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  2. __-_-_-__

    __-_-_-__ God

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    yeah it is bottlenecked because the bandwith is not just reduced, it is VERY low compared to a pci-e 16x.
    it depends on the applications but for bitcoin mining you can expect about 30% performance drop.
    but this is heavily depedent on the graphic card you use because more powerfull ones use more bandwith then less powerfull. so difference could even be less 5-10% if you use a very low end one.
     
    __-_-_-__, Jul 2, 2012
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