CPU

Computer Maintenance

What is a CPU?

Often called the brains of the computer, the CPU is the device that performs the calculations that make computing possible.

Two typical components of a CPU:

The arithmetic logic unit (ALU), which performs arithmetic and logical operations.

The control unit (CU), which extracts instructions from memory and decodes and executes them, calling on the ALU when necessary.

CPU TerminologyFront Side Bus (FSB): Measured in megahertz or gigahertz, the FSB is the channel that connects the processor with the main memory.Multi-core: Composed of two or more independent CPUs in one chip.Cache: Expensive high-speed memory used for storing frequently used instructions.Sockets and slots: Processors either fit in a socket or slot, depending on their construction.

CPU Terminology (cont.)

Pins: Within the categories of sockets and slots, there are different types of each. The types vary by size, and number and configuration of pins.Fans and heatsinks: Heatsinks are little radiators used to radiate the heat away from the processor. Together with the fan they keep the processor’s temperature within a safe range.CPU families: Each member of a family has the same internal design with the only difference being speed and perhaps some less-publicized specifications.

Selecting an Appropriate Processor

Compatibility with the MotherboardSocket or Slot

Brand of processor

Certain models and speed

Fastest with the most cache you can afford.