Internal computer device

Curiosity is inherent not only to children, but also to adults. No doubt, every owner of a personal computer system has repeatedly tried to look inside the case of the system unit to see the computer's device. For some, this is a mystery "with seven seals", and for others (for example, employees of service centers) - the opportunity to earn on ignorance of the former. So, understanding the device of the computer, it is possible to clean the cooling systems and some other components independently of dust, without doubting the quality of the work done and not worrying about the safety of personal data.

What is inside the noisy metal box, called the system unit? We list the main devices of the computer and their functions.

- Pulse power supply unit. Responsible for converting 220V AC mains voltage to a series of constant - 5, 12, 3.3. The quality of this node greatly affects the efficiency of the entire system as a whole. So, there were cases when the budgetary power unit of a little-known manufacturer did not give the required values, because of which the computer constantly hung, and applications were periodically closed with an error message.

- Home (motherboard). It is the basis that unites all components in a single system. It houses connectors for connecting components, internal buses, voltage converters , etc. A very important element without which the computer device can not be considered. Although the budget models with the main tasks quite successfully cope, all manufacturers are offered better solutions, differing with a strengthened power scheme, additional cooling, etc.

- Modules of operative memory. Their difference from the hard drive is that the data in the cells are stored until the power is turned off or restarted. Represent a series of microcircuits on a textolite basis, which connects to the corresponding connector of the motherboard. Memory modules are characterized by the volume, delays in accessing banks of microcircuits, the standard (DDR2, 3, etc.).

- The central processor. Physically represented by a fairly large chip, which includes a lot of transistors. Performs all mathematical calculations. Considering in the assembled system unit the internal devices of the computer, you will not be able to see the processor, as it is closed by the cooling system - a fan (cooler) and a heat sink radiator. The most important parameter is the clock frequency, which indirectly indicates the performance. There are single-core (virtually removed from production) and multi-core models.

Considering the computer device, it should be noted that the four above components are necessary for the functioning of the computer. So, if you can turn on the system unit without a monitor, then it is impossible to work without a processor.

To store all user data, including system applications, a hard disk or hard drive is used. Outwardly it is a small rectangular metal box, inside which special magnetic disks are placed. There is also a new technology - SSD, which is based on solid-state memory cells.

The video card is responsible for displaying the image. It can be discrete (included in the connector of the motherboard), as well as built-in.

The capabilities of the computer greatly expands the sound adapter, drive for reading CDs, peripherals.