Recently, I've started to run two instances of max on my machine. I only allow one to render at a time though, but can work on another scene while waiting. So far, I've never seen the RAM usage go above 38GB.
Do you run multiple instances? How many? Do you render locally on more than one of them at a time?
Do you run multiple instances? How many? Do you render locally on more than one of them at a time?