Lenovo 70AL Maintenance Manual page 53

19 System fan 1 connector
Used to connect the cable of the lower front system fan (front system fan 1).
20 Front panel connector
Used to connect the front panel cable.
21 Front USB 3.0 connector
Used to connect the front USB cable.
22 Platform Controller Hub (PCH)
This chip provides the data buffering and interface arbitration required to ensure that system interfaces
operate efficiently and provides the bandwidth necessary for the system to achieve peak performance.
23 SATA SGPIO connector
Used to connect the SGPIO connector of the mini-SAS signal cable with four SATA connectors and one
SGPIO connector to enable the RAID status LEDs for hot-swap hard disk drives.
24 Internal USB 2.0 connector
Reserved for the manufacturer.
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Chapter 3 Product overview
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