Blender states I'm "Out of memory" when trying to render, but I have tons of unused memory?

Asked Aug 02 '21 at 15:47

Active Apr 13 '23 at 20:17

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I'm having a recurring problem where Blender is refusing to render an image, stating I am out of memory, when I clearly have a huge amount of excess memory available. I'm attempting to render in cycles, optix, no denoising.

The scene is about 1.8 million polies, and a handful of 4k textures (less than 10). In the viewport it states it's using 4 GB of memory, and 6 GB of VRAM. While this sounds like a lot, I am running an RTX 3090 (24GB VRAM) and have 48 GB of system RAM. Is this a matter of Blender not supporting the card, or something else? I rendered much more complex scenes before getting the 3090 with zero issues.

asked Aug 02 '21 at 15:47

Studio Logic

I should also add that "peak" memory at fail, when trying to render, always says about 3800 MB. Nothing else significant is running on the PC. – Studio Logic Aug 02 '21 at 15:51
Have you monitored the GPU memory to see if that's the culprit? – Marty Fouts Aug 02 '21 at 16:33
I have monitored while trying to render, and the GPU ram maxes out at about 9-10 GB during the render (which leaves another 14). And load maxes out at about 30% – Studio Logic Aug 02 '21 at 16:41
Did you set a memory limit for textures or something like that? – Nate_Sycro27 Aug 02 '21 at 16:44
No, I haven't changed any memory settings from default, is there somewhere I can raise that limit? – Studio Logic Aug 03 '21 at 06:20
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Does this answer your question? Why is Blender just using 54% of my CPU when rendering in cycles? – Emir Apr 13 '23 at 20:24
This may be a duplicate, but I don't believe that question is the one. – Allen Simpson Apr 14 '23 at 19:37

Blender states I'm "Out of memory" when trying to render, but I have tons of unused memory?

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