Computer System Unit Components

I learned some components of a CPU. I will not include the others components because their not really important for me. 

Definitions(in my own words)

1. Motherboard- a board where you can see most of the components of a CPU
2. Power Box- source of power in a CPU
3. RAM- the main memory
4. Processor- processes the basic instructions
5. Hard Disk- the secondary memory
7. SATA Cables- cable use to connect the hard disk to the mother board
8. Fan- use to reduce the heat inside the CPU