AGA (Advanced Graphics Architecture) is the third and final generation of Amiga custom chipsets, introduced in 1992 with the Amiga 1200 and Amiga 4000. It significantly enhanced graphics capabilities by supporting 24-bit color depth (16.8 million colors), improved resolution modes up to 1280x512, and added support for chunky pixel modes alongside traditional planar graphics. While maintaining backward compatibility with earlier OCS and ECS chipsets, AGA provided double the chip memory bandwidth and improved blitter performance, though it lacked hardware 3D acceleration features found in contemporary PC graphics cards.