You have to increase virtual memory size to at least sum of the memory of your cards.
Well, for windows it's true but I'm running hiveos(linux). How to be here?
Some people running 13 or more cards and I've never heard that they do virtual memory tuning in linux.
I believe we can configure the swap file or swap area on Linux when installing the OS. It's the same as virtual memory on Windows OS.
However, I haven't tried it after installation, so perhaps this link can help:
https://linuxize.com/post/how-to-add-swap-space-on-ubuntu-18-04/