Lenovo H500s Desktop - Manual (Page 39)

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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
Microprocessor fan header Memory slot
Hard disk drive power connector SATA connectors (2)
PCI express X 16 adapter slot Battery
Clear CMOS jumper LPC debug header
Front panel connector System fan header