CPU

A CPU (Central Processing Unit) is the main processor of a computer. It executes instructions, performs calculations, and controls almost everything the system does.

Think of it as the brain of the computer: it takes input, processes data, and tells the rest of the hardware what to do. Without a CPU, nothing runs.

RAM

RAM (Random Access Memory) is the computer’s short-term memory. It temporarily stores the data and programs the CPU is actively using right now.

More RAM lets your system run more apps at once and switch between them faster. When you shut the computer off, RAM is wiped.

Hard Drive

A hard drive is your computer’s long-term storage. It holds your operating system, programs, files, photos, games—everything that doesn’t disappear when the power is off.

There are two main types:

HDD (Hard Disk Drive): Older, mechanical, slower, cheaper.

SSD (Solid State Drive): Newer, no moving parts, way faster, more reliable.

If RAM is short-term memory, the hard drive is permanent storage.

GPU

A GPU (Graphics Processing Unit) is the processor that handles graphics and visual output. It renders images, videos, animations, and anything you see on the screen.

It also accelerates heavy tasks like gaming, 3D modeling, video editing, and AI workloads. The CPU handles general logic. The GPU handles massive parallel visual math fast.