question

Praveen Dugar avatar image
Praveen Dugar asked ·

GPU memory not utilizing

Hi there,

Arnold For Cinema 4D, C4dtoA Version - 3.3.6
GPU - Zotac gaming Nvidia RTX 3090(Trinity 24GB Graphic Card)

Ram - 64GB, (DDR5)
Nvidia graphic card driver version - 461.92

Arnold renderer was not pulling over 7GB to 8GB, My actual VRAM memory 24GB

here the render screen shots:


screenshot-26.png

Arnold render settings :

Resolution - 4096 x 4096

Camera AA sampling - 10 (max)

Adaptive sampling enabled to - 20 ,0.005

materials -PBR, Default

I don't know why happening like this, if anybody solve this

Please do the needful

Thanks in advance !.

arnoldc4dtoa
screenshot-26.png (987.8 KiB)
screenshot-26.png (987.8 KiB)
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Stephen Blair avatar image
Stephen Blair answered ·

How do we know that more memory was needed?

Can you post an Arnold log?

3 comments
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HI Stephen,

I also checked in another PC ..its working Well

alternative pc is using more than 18GB of 24GB graphic card

0 Likes 0 ·
Do you have an Arnold log from that machine too?

Thanks

0 Likes 0 ·

Here the render Log file


arnoldwatch.txt

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arnoldwatch.txt (27.5 KiB)
Thiago Ize avatar image
Thiago Ize answered ·
00:00:37  7055MB    | peak CPU memory used     7184.30MB
00:00:37  7055MB    | at startup               5773.38MB

Shows that CPU used 7.2GB (with most of that, 5.7GB, coming from C4D and not arnold).

00:00:37  7055MB    | peak GPU memory consumed 1061.56M

Shows that GPU used a peak of 1GB.

00:00:00  5773MB    |  GPU 0: NVIDIA GeForce RTX 3090 @ 1695MHz (compute 8.6) with 24576MB (19558MB available) (NVLink:

Says that before Arnold even started, 24576MB-19558MB, which is 5GB, of GPU memory was already being used up by C4D, Windows, and other applications. So when you see 7GB in GPU-z, about 1GB comes from arnold (maybe 2GB if there's a temporary peak we didn't capture) and the rest is non-arnold applications that also use the GPU.

Everything is behaving as intended.

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