PTI Chapter - 4

The system unit is a case that contains electronic components of the computer used to process data

The inside of the system unit on a desktop personal computer includes:
- Drive bay(s)
- Power supply
- Sound card
- Video card
- Processor
- Memory

The motherboard is the main circuit board of the system unit
- A computer chip contains integrated circuits

The processor, also called the central processing unit (CPU), interprets and carries out the basic instructions that operate a computer
- Contain a control unit and an arithmetic logic unit (ALU)
   - Multi-core processor
   - Dual-core processor
   - Quad-core processor

The control unit is the component of the processor that directs and coordinates most of the operations in the computer
The arithmetic logic unit (ALU) performs arithmetic, comparison, and other operations
For every instruction, a processor repeats a set of four basic operations, which comprise a machine cycle

Most current personal computers support pipelining
- Processor begins fetching a second instruction before it completes the machine cycle for the first instruction

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