If the correct graphics card is showing up in your preferences, if the report there shows that the right features are supported and if your project is set to use hardware acceleration in project settings, the GPU should do a lot in many projects. But it depends on the type of projects you're making: AE has many clients doing widely varying jobs 🙂 I do mostly 1920p vector animations using shape layers or imported AI assets, sometimes 16-bit linear comps of 3D renders. CPU and GPU usage can fluctuate throughout a render: many effects, tranformations and operations like (shape drawing) use your resources differently. One filter can be single threaded, holding the render down to one core. When that filter is out of the timeline, you see other cores join in. The same goes for GPU acceleration. I have a system widget that shows me how my GPU and videocard ram are working. It goes up and down during a render. When motionblur is on for instance, the GPU is working hard. Understanding which operations in AE are multithreaded and which are GPU accelerated can really help speed up an animation. In your effects list, click the menu to show only the effects that are GPU accelerated. This link shows the current overview: https://helpx.adobe.com/nz/after-effects/user-guide.html/nz/after-effects/using/effect-list.ug.html#GPUacceleratedeffects For operations like shape drawing or AI rasterizing, you can sometimes read in the update notes that GPU acceleration was added. Slowly, most parts of AE are being converted. GPU acceleration is going faster than multicore CPU rendering, but that might change in an update.
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