The system board (sometimes called the planar or motherboard) is the main circuit board in your computer. It provides basic computer functions and supports a variety of devices that are factory-installed or that you can install later.
The following illustration shows the locations of parts on the system board.
Fan connectors (2)
DIMM connectors (2)
Serial ATA 1 IDE and Serial ATA 2 IDE hard drive connectors (2)
PCI riser connector
Clear CMOS/BIOS recovery jumper
Promise of Value (POV) daughter card connector
Diskette drive connector
Front panel connector
Parallel ATA primary IDE connector (hard drive and CD-ROM drive)