Dell Inspiron 20 (3048, Early 2014) - Manual (Page 34)

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System Board
System Board
A system board forms the central part of computers. All other devices
connect to the system board to be able to interact with each other.
The system board holds various controllers and connectors that help in
exchange of data among various components of the computer. A system
board may also have integrated graphics, sound, and network capabilities.
Some important components of a system board are:
• Processor socket
• Memory-module connectors
• Expansion-card slots
• CMOS to store the BIOS
The figure below lists the basic components of a desktop system board.
NOTE: Size, shape, and location of components may vary based on the
type of system board and the computer it is designed for.
1 processor socket 2 memory-module connector
3 power connector 4 battery socket
5 PCI-Express x1 connector 6 PCI-Express x16 connector
7 eSATA connector 8 processor