ECS PF21 Extreme User Manual page 15

Motherboard
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11. CHS1 (Chassis Intrusion Detect Header, 2 pin, Black)
This header allows users to detect unauthorized intrusion to the case.
It will alert users with a warning message when the case is turned on.
12. SMI1 (System Management Interrupt Header, 2 pin, Black)
This connector is for use with SMI hardware interrupt power
management.
1-10
13.
PANEL1 (Front Panel Switch/LED Header, 10-1 pin)
The front panel connector provides a standard set of switch and LED
connectors commonly found on ATX or micro-ATX cases.
14. IR1 (Infrared Header, 6-1 pin, Black)
The motherboard supports an infrared (IR1) data port. Infrared
ports allow the wireless exchange of information between your
computer and similarly equipped devices such as printers, laptops,
Personal Digital Assistants (PDAs), and other computers.

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