Product guide
Table Of Contents
- Intel® Desktop Board DG31PR Product Guide
- Revision History
- Preface
- Contents
- 1 Desktop Board Features
- Supported Operating Systems
- Desktop Board Components
- Processor
- Main Memory
- Intel® G31 Express Chipset
- Audio Subsystem
- Legacy Input/Output (I/O) Controller
- LAN Subsystem
- Hi-Speed USB 2.0 Support
- Enhanced IDE Interface
- Serial ATA
- Expandability
- BIOS
- Hardware Management Features
- Power Management Features
- Speaker
- Battery
- Real-Time Clock
- 2 Installing and Replacing Desktop Board Components
- Before You Begin
- Installation Precautions
- Installing the I/O Shield
- Installing and Removing the Desktop Board
- Installing and Removing a Processor
- Installing and Removing Memory
- Installing and Removing a PCI Express x16 Card
- Connecting the Diskette Drive Cable
- Connecting the IDE Cable
- Connecting the Serial ATA (SATA) Cables
- Connecting to the Internal Headers and Connectors
- Connecting to the Audio System
- Connecting Chassis Fan and Power Supply Cables
- Setting the BIOS Configuration Jumper
- Clearing Passwords
- Replacing the Battery
- 3 Updating the BIOS
- A Error Messages and Indicators
- B Regulatory Compliance

Desktop Board Features
17
Legacy Input/Output (I/O) Controller
The legacy I/O controller features the following:
• Low pin count (LPC) interface
• One serial port interface via an onboard header
• Serial IRQ interface compatible with serialized IRQ support for PCI systems
• Intelligent power management, including a programmable wake up event interface
• PCI power management support
LAN Subsystem
The LAN subsystem includes:
• Intel ICH7
• Realtek 8111-GR Gigabit Ethernet Controller for operation at 10/100/1000 Mb/s
• RJ-45 LAN connector with integrated status LEDs
The subsystem features:
• CSMA/CD protocol engine
• LAN connect interface between ICH7 and the LAN controller
• PCI bus power management
Related Links:
Go to the following link for information about LAN software and drivers:
http://support.intel.com/support/motherboards/desktop
RJ-45 LAN Connector LEDs
Two LEDs are built into the RJ-45 LAN connector located on the back panel (see
Figure 2). These LEDs indicate th
e status of the LAN.
Figure 2. LAN Connector LEDs