As soon as I saw your post, I was about to suggest Puget Systems whitepapers. They do a ridiculous amount of research and publicly post it so you can see what differences matter where.
AE is still very CPU-based, so, as the info from Chris suggests, AE won’t benefit that much from a bigger GPU. That said, Task Manager is not a reliable way to track GPU usage at all. So I wouldn’t rely on its reporting that much.
AE can use the GPU to accelerate some transformations, but the GPU acceleration really shines when you’re using the GPU-accelerated effects like Fractal Noise.
To speed AE up on your machine, I’d say maybe look into something like Render Garden that can use more cores of your CPU vs. any hardware upgrade. Notice how little your CPU is being used? That’s where AE does most of its rendering work.
Keep in mind that the AE team has publicly said that they are working on making AE’s rendering a lot more multithreaded, so hopefully that work pays off in the future for people like us with lots of cores.
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