CPU usuage wont go above 10% - Multiframe enabled

[Jay D5EBE]

I know this has been asked before, but wondering if there is any updated information as I couldn't find a solution / clarity in older threads I read. 

As title says, when working or rendering with After Effects, the CPU usuage never goes above 10% (according to task manager). I have enabled the multiframe rendering option, although it doesn't seem to be helping. It is a 12 core CPU and the average usage is about a 12th of 100%. Are there any other settings I can check or anything I can do to get AE to utelize more of the CPU/cores?

SPEC:

Ryzen 9 5900x (12-core)
RTX 3080Ti
32gb DDR4 3200MHz
PSU Corsair 850w
Drives:
SSD - Windows OS + Apps (inc adobe)
M.2 - Footage/Proxies/ Active Project files
2nd M.2 - Media Cache

[Mylenium]

without any info about the contents of the project and what effects and features are used we can't tell you much. that is whjat it comes down to. Despite MFR and GPU acceleration existing, a lot of things in AE barely make make use of those features due to limitations under the hood and using a single "wrong2 effect or feature can make things crawl along on just one or two cores and no GPU usage.

Mylenium

[Jay D5EBE]

Thanks for the response. Bizarely after trying different ae versions for several hours, resetting the computer, rendering certain comps in batches, I've managed to see the likes of 30% usuage. But it declines as the render goes on. (Maybe as more assets are on screen at once in the comp?

The project is mostly a mix of animated shape layers and illustrator files and png sequences, with a few occasional effects ontop (some of which GPU accelerated). Nothing too fancy. But one part I think it struggled with in particular was lots of (maybe around 100) small shape layers in a pre-comp which all have a random wiggle effector on opacity.