Lenovo H505 Desktop - Manual (Page 41)

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User Guide
Identifying parts on the system board
The system board (sometimes called the 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 illustrations show the locations of parts on the system board.
Lenovo H505
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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)