What is a CPU?
Discover what a CPU is, why it's called the brain of the computer, and how it processes millions of instructions every second!
What is a CPU?
CPU stands for Central Processing Unit. It is the most important chip inside your computer — often called the brain of the computer. Every time you click, type, or watch a video, the CPU is hard at work!
What Does the CPU Do?
The CPU follows a simple three-step cycle over and over, billions of times per second:
- 📥 Fetch — Gets the next instruction from memory.
- 🔍 Decode — Figures out what the instruction means.
- ⚡ Execute — Carries out the instruction.
How Fast is a CPU?
Modern CPUs run at speeds measured in GHz (Gigahertz). A 3 GHz CPU can perform 3 billion cycles per second. That's faster than you can blink your eye!
CPU Cores
Modern CPUs have multiple cores — think of each core as a separate brain. A quad-core CPU has 4 cores and can work on 4 tasks at the same time!
Imagine the CPU is a chef. A single-core CPU is one chef doing all the cooking. A quad-core CPU is four chefs cooking different dishes at the same time — much faster!
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