1. The System Board and Components

2. The System Board/Motherboard the central printed circuit board (PCB) in many modern computers and holds many of the crucial components of the system, while providing connectors for other peripherals. The motherboard is sometimes alternatively known as the main board, system board, or planar board.printed circuit boardcomputers

3. Processor slots or sockets ssockets (or slots) in which one or more microprocessors may be installed.

4. Continuation..  A CPU socket or slot is an electrical component that attaches to a printed circuit board (PCB) and is designed to house a CPU (also called a microprocessor). It is a special type of integrated circuit socket designed for very high pin counts. A CPU socket provides many functions, including a physical structure to support the CPU, support for a heat sink, facilitating replacement (as well as reducing cost), and most importantly, forming an electrical interface both with the CPU and the PCB.

5. Memory slots/bank  A memory bank is a logical unit of storage in electronics, which is hardware dependent. In computer the memory bank may be determined by the memory access controller and the CPU along with physical organization of the hardware memory slots.

6. Chipset Chips  A chipset, PC chipset or chip set refers to a group of integrated circuits, or chips, that are designed to work together. They are usually marketed as a single product.integrated circuits

7. Power Connectors  A power connector is an electrical connector designed to carry a significant amount of electrical power, usually as DC or low-frequency AC. Some types of RF connector may also carry large amounts of power, but are considered as a separate category. Connectors carrying small amounts of power are known as signal connectors.connectorelectrical powerDCACRF connector

8. Types AAC power plugs DDC plugs PPersonal Computer power supply LLucar or Blade Connector serial ATAserial ATA (SATA) power connectors

9. Capacitors A capacitor (formerly known as condenser) is a passive electronic component consisting of a pair of conductors separated by a dielectric (insulator). When there is a potential difference (voltage) across the conductors a static electric field develops in the dielectric that stores energy and produces a mechanical force between the conductors. An ideal capacitor is characterized by a single constant value, capacitance, measured in farads. This is the ratio of the electric charge on each conductor to the potential difference between them.passiveelectronic componentconductorsdielectricpotential differenceelectric fieldenergycapacitancefaradselectric charge

10. BIOS chips In principle, the BIOS in ROM was customized to the particular manufacturer's hardware, allowing low- level services (such as reading a keystroke or writing a sector of data to diskette) to be provided in a standardized way to the operating system.

11. PhoenixBIOSPhoenixBIOS D686. This BIOS chip is housed in a PLCCpackage, which is, in turn, plugged into a PLCC socket.PLCC

12. CMOS battery The memory and real-time clock are generally powered by a CR2032 lithium coin cell. These cells last two to ten years, depending on the type of motherboard, ambient temperature and the time that the system is powered off, while other common cell types can last significantly longer or shorter periods, such as the CR2016 which will generally last about 40% as long. Higher temperatures and longer power-off time will shorten cell life. When replacing the cell, the system time and CMOS BIOS settings may revert to default values.real-time clockCR2032lithiumcoin cellCR2016

13. Type CR2032 button cell, most common CMOS batterybutton cell