v 
Contents 
1  Product Description 
1.1  Overview.......................................................................................... 9 
1.1.1  Feature Summary .................................................................. 9 
1.1.2  Board Layout ....................................................................... 11 
1.1.3  Block Diagram ..................................................................... 13 
1.2  Legacy Considerations...................................................................... 14 
1.3  Online Support................................................................................ 14 
1.4  Processor ....................................................................................... 14 
1.5  Intel
®
 H55 Express Chipset ............................................................... 15 
1.6  System Memory .............................................................................. 15 
1.6.1  Memory Configurations ......................................................... 16 
1.7  Graphics Subsystem ........................................................................ 18 
1.7.1  Integrated Graphics.............................................................. 18 
1.7.2  PCI Express x16 Graphics ...................................................... 19 
1.8  USB............................................................................................... 19 
1.9  SATA Interfaces .............................................................................. 20 
1.10 Legacy I/O Controller....................................................................... 20 
1.10.1  Serial Port........................................................................... 20 
1.10.2  Parallel Port......................................................................... 21 
1.11 Audio Subsystem............................................................................. 21 
1.11.1  Audio Subsystem Software .................................................... 21 
1.11.2  Audio Connectors and Headers ............................................... 21 
1.12 LAN Subsystem............................................................................... 23 
1.12.1  Intel
®
 82578DC Gigabit Ethernet Controller.............................. 23 
1.12.2  LAN Subsystem Software....................................................... 23 
1.12.3  RJ-45 LAN Connector with Integrated LEDs .............................. 24 
1.13 Real-Time Clock Subsystem .............................................................. 25 
1.14 Hardware Management Subsystem .................................................... 25 
1.14.1  Hardware Monitoring and Fan Control...................................... 25 
1.14.2  Fan Monitoring..................................................................... 25 
1.14.3  Chassis Intrusion and Detection.............................................. 26 
1.14.4  Thermal Monitoring .............................................................. 26 
1.15 Power Management ......................................................................... 27 
1.15.1  ACPI................................................................................... 27 
1.15.2  Hardware Support ................................................................ 30 
1.15.3  ENERGY STAR* 5.0, e-Standby, and ErP Compliance ................. 34 
2  Technical Reference 
2.1  Memory Resources .......................................................................... 35 
2.1.1  Addressable Memory............................................................. 35 
2.1.2  Memory Map........................................................................ 37