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NVLINK SUPPORT

Discussion in '2021.2 Beta' started by TekHK, Jun 27, 2021.

  1. TekHK

    TekHK

    Joined:
    Jul 30, 2014
    Posts:
    37
    Hi Unity team,

    Can somebody tell me if NVLINK on two a6000 GPUs is supported inside Unity? By supported I mean:
    1. Will Unity see the pooled 96gb of GPU Memory?
    2. Does this increase the raytracing performance in HDRP by pooling the resources of each card
    3. How about DLSS - will this be affected by the pooled resources on the cards?
    4. Will pathtracing take advantage of the two cards linked?
    Are there any specific settings that need to be enabled inside the HDRP asset settings to enable any features?

    I have actually tried this and it appears that once the first card is full up the second will not start using memory and Unity will crash.

    Thanks
     
  2. LeonhardP

    LeonhardP

    Unity Technologies

    Joined:
    Jul 4, 2016
    Posts:
    3,110
    Hi @TekHK,

    Multi-GPU setups are not officially supported.
     
  3. madrobotMK

    madrobotMK

    Joined:
    Nov 19, 2013
    Posts:
    17
    is there some unofficial way for it? How can we custom implement nv-link support with unity?
     
  4. TekHK

    TekHK

    Joined:
    Jul 30, 2014
    Posts:
    37
    hi @LeonhardP Is this on the roadmap. when we are talking about massive simulations it is important to have as much available memory as possible - also for GPU rendering (GI and Pathtracing) the performance gains are enormous
     
    Last edited: Jul 21, 2021