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GPU Memory Utilization

nakamuram002nakamuram002 Posts: 787
in Technical Help (nuts n bolts)

Attached is an excerpt from a log file where IRAY was unable to perform GPU rendering due to lack of VRAM.  Is there a way to script a "pre-analysis" of a scene to determine how much VRAM will be required for GPU rendering?  It would also be nice to produce a list of objects in a scene and how much VRAM each utilizes.  Which API(s) would I have to use to accomplish this?

txt
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OutofMem.txt
596K

Comments

  • Richard HaseltineRichard Haseltine Posts: 100,666

    Unfortunately it isn't possible to calculate how much memory wil be used in advance.

  • nakamuram002nakamuram002 Posts: 787

    Richard Haseltine said:

    Unfortunately it isn't possible to calculate how much memory wil be used in advance.

    Maybe in a later revision... 

  • PerttiAPerttiA Posts: 10,024

    nakamuram002 said:

    Richard Haseltine said:

    Unfortunately it isn't possible to calculate how much memory wil be used in advance.

    Maybe in a later revision... 

    Nope, actually the opposite. DS 4.15 didn't tell how much VRAM a scene would use, but it did show how much VRAM was used. This information was removed by Nvidia in later versions.

    In general, a GPU with 8GB's of VRAM is about minimum usable with current DS and newest assets.
    Personally I upgraded my 8GB RTX 2070 Super to a 12GB RTX 3060 a couple of months ago just to get more VRAM.

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