I have recently bought a new machine and I can't see why I can't get the percentage of ram used to higher than 7-30% when rendering.
I have tried increasing and decreasing the amount of ram and processors allocated to other programs (10gigs of the 64 gigs of ram and 3 of the 12 processors currently)
Even when AE is the only program running the percentage of ram used doesn't go up.
What am I missing?
Memory allocation is dynamic. The program takes what it needs for a given task and no more. Beyond that there's a million other factors like effects and CoDecs not being MP safe and only rendering single-threaded and whatnot. Anyway, that's an AE specific question, so search the forum and post your questions there. This stuff is being asked once every weeek and you will find equally as many answers. As a start, also read this: