1. Millions of little gates
Transistors
Millions of little gates

2. Central Processing Unit
Does 90% of your computer’s work
Only job is to process binary code
Made of million transistors

3. Processing CPU takes input in binary code
CPU does really simple math to input
CPU gives output in binary code

4. Transistors Electronic parts 2 inputs, 1 output
Material in transistor determines what output will be.
First built in 1947
As big as a small basketball
Designed smaller and smaller over the years
Input A
Input B
Output Q

5. Modern CPU CPU made of 100-200 million transistors
Transistors connected together to process binary code
A look inside CPU

6. And Gate Transistor Output is on when both A AND B are on Input A1 1
Input A
Input B
Output Q 1 1

7. Nand Gate Transistor Circle in symbol means “not”
Output is on when both A and B or NOT on
Input A
Input B
Output Q 1 1

8. Transistors Connected
And Gate A B Q 1 1 1
Or Gate A B Q 1
Nor Gate 1 A B Q 1

9. Operating Frequency 1 CPU’s operate a different speeds1
CPU’s operate a different speeds
Speed measured in hertz
1 hertz = 1 calculation per second
Modern CPU’s run at 2-3 Gigahertz
2-3 billion calculations per second

10. CPU on Newegg