What is a GPU? (Graphics vs. Brains)

You want to play Cyberpunk 2077. You need an NVIDIA RTX 4090. But why does a “Graphics” card also power ChatGPT and Self-Driving Cars?

The CPU (The Professor)

Your CPU (Intel/AMD) has 8 to 16 cores. It is smarter than Einstein. It can do Calculus, Logic, and run an Operating System. But it can only do ~16 things at once. It is a Serial Processor.

The GPU (The Army)

Your GPU has 16,000 Cores. But they are dump. They can only do basic math (Add/Multiply). But they can do it ALL AT ONCE. It is a Parallel Processor.

Why Robots Need GPUs

• Computer Vision: An image has 2 million pixels.
• A CPU looks at pixel 1, then pixel 2, then pixel 3… (Slow).
• A GPU looks at ALL 2 million pixels simultaneously. “Hey, I see a yellow pixel at (100,100)!” This parallelism allows robots to detect game pieces at 30 FPS instead of 1 FPS. We don’t just use GPUs for pretty graphics; we use them for Sight.