Lenovo H535s Desktop - Manual (Page 45)

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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.
Lenovo H505s
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Microprocessor and heat sink Microprocessor fan header
Memory slots (2) Power connector
Thermal sensor header Front panel connector
Battery SATA connectors (2)
Mini PCI-E slot Front USB connectors (2)
Clear CMOS jumper PCI express X 1 adapter slot
Front audio connector