Computer knowledge

A graphics card is a piece of hardware that deals with the processing of images and videos, it's a printed circuit board that controls and generates output to a display device like a computer monitor. And at the core of the video card is a chip called the graphics processing unit (GPU), which is the main part that does the actual computations. Other names for graphics card: Display card, video card, display adapter, or graphics adapter.

Power supply unit (Short: PSU) It converts the high-voltage AC power from a wall outlet to low-voltage regulated DC power, for the internal components of a computer. Modern personal computers universally use switched mode power supplies. There are normal and very efficient power supply units. And even more efficient power supply units are being developed. And there are special, power supply units for very heavy duty computing and gaming for example.

Random access memory (RAM) Random access memory is an extremely fast type of computer memory which temporarily stores data and machine code which is in current use and which will be used within a short period of time. Random access memory allows data items to be read or written extremely fast because: -It has a very fast path to the computer's central processing unit. -It does not have mechanical limitations such as rotation speeds and moving arms with magnetic heads. -How it reads and writes data is different then for example magnetic storage. The capacitor holds a high or low charge (1 or 0), and the transistor acts as a switch that lets the control circuitry on the chip read the capacitor's state of charge or change it's state. The transistor is used to admit current into the capacitor during writes, and for discharging the capacitor during reads. It's a form of short term memory, it can't store permanent data. And if the power shuts down, and the memory ...

Central Processing Unit (CPU) (Short: Central processor) The central processing unit carries out the instructions of a computer program by performing the basic arithmetic, logic, controlling, and input/output (I/O) operations specified by the instructions. To function properly, the central processor relies on: Memory, secondary storage, data and address buses and the systems clock. The central processing unit has 2 components: -The control Unit: extracts instructions from memory and decodes and executes them. -The arithmetic Logic Unit (ALU): handles arithmetic and logical operations. The central processor contains internal memory units, which are called registers. And these registers contain data, instructions, counters and addresses used in the arithmetic Logic Unit informations processing. Some computers utilize two or more processors. These consist of separate physical central processing units, located side by side on the same board or on separate boards. Each central processing un...