Abit BE7-G User Manual page 35

Hardware Setup
(8). SMB1: System Management Bus Headers
This header is reserved for system management bus (SM bus). The SM bus is a specific implementation
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of an I C bus. I C is a multi-master bus, which means that multiple chips can be connected to the same
bus and each one can act as a master by initiating a data transfer. If more than one master simultaneously
tries to control the bus, an arbitration procedure decides which master gets priority.
(9). JP1: Thermal Sensor Header
This connector is a thermal sensor connector used for detecting the system environmental temperature. It
may also be called a system temperature detector. You can attach one end of a two-threaded thermal cable
to this header, and attach the other end of the thermal cable onto any heat source, such as VGA chipset's
heatsink, or Hard Disk Drive.
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User's Manual