Adobe’s official "Minimum Requirements" are technically enough to open the application, but they are not enough for a smooth creative workflow. After Effects is arguably the most resource-hungry application in the Adobe Creative Cloud suite. If you stick to the bare minimums, you will spend more time watching loading bars than creating.

Intel’s 13th/14th gen (high boost clocks) or AMD’s X3D series (large cache helps with preview caching).

Building the Ultimate After Effects Computer - School of Motion