Memory per core?

[nauticus25]

We're putting together our shopping list for our updated render nodes, and choked a little when we saw RAM prices these days.  Our lease cycle is three years and RAM prices were much more palatable back in 2014.

Anyways, we're looking at a dual Xeon Gold 6140 which is an 18 core chip.  That'd give us 36 cores / 72 threads.  Is 64GB of RAM going to be enough?  The scenes we're doing have been pushing 30GB or so during renders, so we've got plenty of overhead there.  But I've read here and there something about having 2GB per core.  What happens when you have less than 2GB per core?  Jumping up to 128GB of RAM is outside our budget.  I'd like to get as many cores as I can because I'll have this for 3 years, but don't want to shoot myself in the foot by not getting the right components.

Thanks!

[agentdark45]

Damn, that's a serious setup! I haven't heard anything about the 2GB rule that you've mentioned but my interest is piqued so am following this thread.

RAM prices at the moment make me sad.

[Ondra]

Corona AFAIK uses about 50 MB per core extra. So you dont need to worry :D This is not GPU rendering :D. Just the total amount of RAM matters

[nauticus25]

Thanks Ondra.  That settles it, then.  New render nodes have been ordered.  Can't wait to run the benchmark!