Asus P4B-MX Motherboard DIY Troubleshooting Guide - Page 46
optional, Internal Audio Connectors, SMB Connector
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8. Internal audio connectors (4-pin CD_IN, AUX) (optional) These connectors allow you to receive stereo audio input from sound sources such as a CD-ROM, TV tuner, or MPEG card. Left Audio Channel Ground Ground Right Audio Channel Ground Left Audio Channel Ground Right Audio Channel ® P4B-MX CD_IN AUX P4B-MX Internal Audio Connectors Figure 2-32 Internal Audio Connectors 9. System management bus connector (6-pin SMB) This connector allows you to connect System Management Bus (SMBus) devices. Devices communicate with an SMBus host and/or other SMBus devices using the SMBus interface. SMBus is a specific implementation of an I2C bus, a multi-device bus that allows multiple chips to connect to the same bus and enable each one to act as a master by initiating data transfer. SMBCLK Ground SMBDATA +5V SMB ® P4B-MX 1 P4B-MX SMBus Connector Figure 2-33 SMB Connector 2-26 Chapter 2: Hardware information