Which processor did Sony name as the PlayStation 2’s central processing unit?

Sony named the PlayStation 2’s central processing unit the Emotion Engine.

The Emotion Engine was a custom processor developed for the PlayStation 2 and manufactured initially by Sony and Toshiba. Its design combined a central processing unit with specialized vector units intended to handle the mathematical workloads used in 3D graphics and game simulations.

The PlayStation 2 also included the Graphics Synthesizer, a separate graphics processor responsible for rendering. These distinctive component names became part of Sony’s technical marketing and are often confused with the Cell Broadband Engine, which belonged to the PlayStation 3.

The Emotion Engine was important to the PS2’s architecture, but the console’s results also depended on its memory system, graphics hardware, software tools, and developers’ ability to use the hardware effectively.