Error: Out Of Memory. Dual RTX 3080?

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#1

I’ve a PC build with RTX 3080 with 10GB VRAM. 10GBs aren’t enough virtual memory for me when I have to render out a heavy file, as it fails to render by giving Error: Out Of Memory.

I want to upgrade my build. Now the question is, if I upgrade to having dual RTX 3080s, will that help in optimising the memory? I am confused as 3080s don’t have NVlink in their hardware. But then, would memory still be split through the motherboard and fix the memory error?

Or should I get an RTX A5000 with 24GB VRAM? 24GBs should be fine for me. But will RTX A5000 work together with my RTX 3080 to give faster renders?

My PC’s specs below, if needed -

Ryzen 9 3950X MSI MEG X570 ACE MSI Geforce RTX 3080 Gaming X Trio 10GB

#2

If you run both the 3080 and A5000 you will render faster, BUT you will be limited to the lowest memory of the two (10 GB in this case), as each GPU needs to load the scene to it’s VRAM.

You can render on the A5000 alone and let the 3080 drive the viewport.

If you had two NVLINK compatibles cards then yes, they get their memory seen as one big pool (like A5000 x2 for 48GB total).

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#3

This makes sense to me. I wish it weren’t true though, but oh well.

Thanks for the detailed answer!