⚡ Let’s Talk Speed

You press a key.

The letter shows up.

The computer doesn’t say “Hold on, I’m thinking.”
It shows it immediately.

But inside, it just:

• Read an instruction

• Understood it

• Ran it

• Moved to the next thing

How fast?

👉 Billions of times per second.

🕒 Meet the Clock

The CPU or the computer’s brain uses a tiny electric clock to stay in rhythm.

Every time the clock “ticks,” the brain does:

• One fetch

• One decode

• One run

The faster the clock ticks, the faster the brain works.

🧭 Example Speeds

• 1 million ticks per second = 1 Megahertz (old computers)

• 1 billion ticks = 1 Gigahertz (GHz)

Most phones and laptops now run at 2 to 4 GHz.
That means they can do 4 billion instructions per second.

That’s how fast this CPU works.

🚀 Why Speed Matters

• Slow clock = programs take longer

• Fast clock = smooth games, fast loading, better performance

But even at slow speeds, the brain never stops following its steps.