Computer Performance

The system unit is the unit, which contains the components inside a computer system. It contains hard disk, memory, CD-ROM, nagpalamig fans, bus lines, etc.
CPU
Processing units in Thailand, the 'brain of a computer. Each machine has a processing unit.Therefore, treatment is not a unique feature of the computer. Is characterized by the memory of the computer. CPU executes all arithmetic and logic decisions of the computer. Input to the computer input device. The CPU processes data according to the instructions of the user.
(1) ALU (arithmetic and logic unit)
The ALU performs all arithmetic and logic operations. The basic arithmetic operations like addition, multiplication, and division. A rational action means that the amount of data comparison. This amount can be a character of the two numbers or letters. When running a program, usually loaded with memory data. The data make the transition from main memory to the ALU manipulates the control unit ALU in order.
(2) Control Unit
The control unit controls the link of all other units in the operation of the computer. It is responsible for all the participants of the guide data in the memory of the ALU. Then, the interpretation and implementation of these guidelines. Processed data, the unit will issue orders to process the data to main memory. It also controls I / O devices and auxiliary storage devices.
Its performance and use (CPU)
(1) CPU speed - the number of peacekeeping operations per second can be done.
(2) The size of the text - the ability to keep the operator.
(3) data lines - maximum capacity can be gained from operating the CPU.
(4) maximum memory memory, CPU can handle the costs.
motherboard
Micro-computer is the main board. This ban includes the council added the connection. In the normal case, the motherboard contains the CPU, memory, mass storage interfaces, BIOS, serial and parallel ports, expansion slots, and requires all controllers to control such as monitors, standard keyboards, and peripheral drives. In general, all the chips on the motherboard called the motherboard chipset. Supply functions of the Unit (PSU) is a source of energy for the computer will switch to the main power appropriately. (For example: - in Sri Lanka, 230 volts, 12 volts AC to exchange) Peripherals consider is the name of the device inputs and outputs. Expected, memory and CPU, all devices connected to the computer. They are called peripherals. Some devices around only be used for input or output, but some, such as device input and output. Circuit devices attached to the computer using the port.
Port
Ports used to connect to the computer equipment. Them to a gateway computer. (1) serial port - PC interface, compatible with PHP - 232 standard interface. The 9-pin connection, the transmission of information, or go to a byte time. Each byte is divided into 8-bit range, so long serial port. Serial port interface standard, one of the oldest species. Before the popularity of built-in modem, external modem is connected to the computer through a serial port, but also to communicate or "COM port" is known. A computer mouse and use the serial port to connect to the computer, and even the keyboard. Some use 25-pin serial connection, but often, 9-pin much. Here are the ports controlled by a special chip called a UART (Universal Asynchronous Receive relay). (2), parallel port, the parallel is used to connect printers and other devices outside the gates. Parallel port 25 - pin. Thus, the DB type of port - 25.The first man-made parallel port interface name. It is called, according to a company computer and communication in the original standard parallel interface. HP parallel interface based on modern design. A new type of parallel port, it supports both interfaces that connect the implementation of the EPP (Enhanced Parallel Port) or ECP (Extended Capabilities Port). Both parallel ports support bi-direction communication and transmission speeds 10 times faster than the port interface. (3) PS / 2 port developed by IBM for connecting a mouse or keyboard to type PC port. The PS / 2 port support in 6-pin DIN plug containing just a little. Most computers with PS / 2 port, so the serial port can be passed to other devices, such as a modem. The PS / 2 port is often called the mouse port. The PS / 2 IBM Personal System / 2. For the port used to connect the keyboard port purple and green are used to connect the mouse image.
(4) graphics port video graphics array first introduced in IBM. It has 15-pin. The design of the port of IBM. This is a 1987 design now, and we use it. It is used to connect a computer screen.
(5) Port Sound Card audio interface for connecting speakers, microphones, head phones prevent boofers
Game Port
Portal game is made by IBM. First, it was released in 1981 as a separate expansion card. The 15-pin, but now the game port to USB port to bereave.

USB
Portal was created in January 1994. By Intel, Compaq, Microsoft, Digital, IBM and Northern Telecom. USB is a Universal Serial Bus stand. The number of devices connected to the computer around. Such as mouse, keyboard, PDA, Joysticks and game pieces, scanners, digital cameras, printers, media personal player, flash drives and external hard drive. USB USB 1.0 is the first for men in 1994. This USB data transfer speed of 12 mega bits per second. USB 1.0 is Intel, Compaq, Microsoft, Digital, IBM and other major groups of Northern Telecom. UHCI host controller and Intel's open software stack, Microsoft has implemented a USB software stack written in Windows and the host OHCI and National Semiconductor Corporation and Compaq more control; previous Philips USB, audio, and Texas Instruments was the most acceptable use chip mass. One of the co-inventor of the USB is the man: Ajay Bhatt, and then released in USB 2.0,2000 in April. It is by Hewlett-Packard, Intel, clearly Technologies (now Motorola, Microsoft, NEC, Philips, a joint venture work. Develop a higher data transfer rates of 480 mega bits per second, compared with 12 m per second plus the specification in 1.0, USB 3.0 specification was released on November 17 by the USB 3.0 Promoter Group in 2008 .. it is the transfer rate of up to 10 times USB 2.0 version, and is defined as a super high-speed USB.