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SLI Bridge Supported?

UnderTheBlackHatUnderTheBlackHat Posts: 23
in Technical Help (nuts n bolts)

I was inquiring with EVGA before starting the puchase of new video card(s) - we discussed using 2 cards with an SLI Bridge, and the tech person said DAZ would have to support it or it would be a waste of money.

Does anyone know if DAZ (current version) supports SLI bridges and will allow the 'spread' of tasking across both cards?  My thinking is this will help speed up renders at the higher resolutions and more complex set ups and such.

Thanks in advance for any information available.

Comments

  • Kevin SandersonKevin Sanderson Posts: 1,643

    SLI does not work with Iray. SLI causes problems.

     

  • UnderTheBlackHatUnderTheBlackHat Posts: 23

    Thanks, that solves a quesiton of what I'll be buying.  Guess I'm investing in a 1080Ti card as opposed to two smaller cards huh?

     

  • fastbike1fastbike1 Posts: 4,078
    edited August 2018

    Studio will support more than one Nvidia GPU, just not w/ SLI. Note that CUDA cores will be additive but VRAM will not.

    Any GPUs that do not have enough VRAM will be droppped from the Iray render.

    As an example, say you have an 8GB 1070 and an 11 GB 108ti. Your scene uses 9 GB of VRAM. The 1080GTI will be used but the 1070 won't contribute, the render speed will be as if there was a single 1080 ti.

    If your scene needs 6GB of VRAM both cards will be used and the render speed will be faster. 

    The cards do not have to be identical however twice the Cuda cores will not make a render twice as fast. On the positive side, render quality will be the same whether all GPUs are used or not.
     

    Post edited by fastbike1 on
  • DefenistratDefenistrat Posts: 68
    P_Migala_6a3d7f97fb said:

    Thanks, that solves a quesiton of what I'll be buying.  Guess I'm investing in a 1080Ti card as opposed to two smaller cards huh?

     

    FYI, I was researching the same thing a year or two ago. I got a 1070. Changed how I used Daz, for the better, because everything was so much faster. I'm sure a 1080Ti will do you just fine :)

  • CGHipsterCGHipster Posts: 241
    edited August 2018

    I recently added a second 1070 card to my machine, I did nothing more than drop the card in and Daz saw it straight away.  Was the easiest thing I have ever done with my machine.  I solve vram issues with larger scenes with scene optimizer and decimate when needed.

    Post edited by CGHipster on
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