FDE: fetch, decode, execute instructions

CPU purpose: to fetch, decode and execute instructions

1) Add another cache
2) Improve clock speed
3) Add more cores

The cache is a small amount of storage which is close to the CPU. It's closer than RAM. It has 3 levels. Level 1 is the smallest and level 3 is the largest. Level 1 is the closest of the three.

The control until controls the data moving throughout the computer.

The arithmetic logic unit makes all the logical decisions and does calculations

Registers carry a tiny amount of data. They are one of the fastest possible.