v 
Contents 
1  Product Description 
1.1  Overview ......................................................................................................................10 
1.1.1  Feature Summary..........................................................................................10 
1.1.2  Manufacturing Options ..................................................................................11 
1.1.3  Board Layout .................................................................................................12 
1.1.4  Block Diagram ...............................................................................................14 
1.2  Online Support .............................................................................................................15 
1.3  Processor.....................................................................................................................15 
1.4  System Memory ...........................................................................................................16 
1.4.1  Memory Configurations .................................................................................17 
1.5  Intel
®
 955X Chipset......................................................................................................21 
1.5.1  USB ...............................................................................................................21 
1.5.2  IDE Support...................................................................................................21 
1.5.3  Real-Time Clock, CMOS SRAM, and Battery................................................23 
1.6  Discrete Serial ATA Interface (Optional)......................................................................24 
1.7  PCI Express Connectors..............................................................................................24 
1.8  Auxiliary Power (AUX PWR) Output Connector (Optional)..........................................25 
1.9  IEEE-1394a/b Connectors (Optional)...........................................................................25 
1.10  I/O Controller................................................................................................................26 
1.10.1  Serial Port......................................................................................................26 
1.10.2  Parallel Port...................................................................................................26 
1.10.3  Diskette Drive Controller................................................................................26 
1.10.4  Keyboard and Mouse Interface .....................................................................26 
1.11  Audio Subsystem .........................................................................................................27 
1.11.1  Audio Subsystem Software ...........................................................................27 
1.11.2  Audio Connectors..........................................................................................27 
1.11.3  8-Channel (7.1) Audio Subsystem.................................................................28 
1.11.4  6-Channel (5.1) Audio Subsystem.................................................................30 
1.12  LAN Subsystem ...........................................................................................................31 
1.12.1  Intel
®
 82573E/82573V/82574V Gigabit Ethernet Controller..........................31 
1.12.2  RJ-45 LAN Connector with Integrated LEDs.................................................31 
1.12.3  Alert Standard Format (ASF) Support ...........................................................32 
1.12.4  Intel
®
 Active Management Technology (AMT) (Optional)..............................32 
1.12.5  LAN Subsystem Software..............................................................................34 
1.13  Hardware Management Subsystem.............................................................................34 
1.13.1  Hardware Monitoring and Fan Control ASIC.................................................34 
1.13.2  Thermal Monitoring........................................................................................35 
1.13.3  Fan Monitoring...............................................................................................36 
1.13.4  Chassis Intrusion and Detection....................................................................36 
1.14  Power Management.....................................................................................................36 
1.14.1  ACPI ..............................................................................................................36 
1.14.2  Hardware Support .........................................................................................39 
1.15  Trusted Platform Module (Optional).............................................................................43