Lenovo H30-00 Desktop - Manual (Page 41)

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User Guide
Identifying parts on the system board
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.
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System fan header Microprocessor and heat sink
Microprocessor fan header Memory connector
Hard disk and optical disk drive
power connector SATA connectors (2)
PCI express X 16 adapter slot Battery
Hardware clear CMOS jumper LPC debug header