Summary of the content on the page No. 1
Intel® Desktop Board DG41MJ
Product Guide
Order Number: E59138-001
Summary of the content on the page No. 2
Revision History Revision Revision History Date ® -001 First release of the Intel Desktop Board DG41MJ Product Guide February 2009 If an FCC declaration of conformity marking is present on the board, the following statement applies: FCC Declaration of Conformity This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, inclu
Summary of the content on the page No. 3
Preface This Product Guide gives information about board layout, component installation, BIOS ® update, and regulatory requirements for Intel Desktop Board DG41MJ. Intended Audience The Product Guide is intended for technically qualified personnel. It is not intended for general audiences. Use Only for Intended Applications All Intel Desktop Boards are evaluated as Information Technology Equipment (I.T.E.) for use in personal computers (PC) for installation in homes, offices, schools,
Summary of the content on the page No. 4
Intel Desktop Board DG41MJ Product Guide Conventions The following conventions are used in this manual: CAUTION Cautions warn the user about how to prevent damage to hardware or loss of data. NOTE Notes call attention to important information. Terminology The table below gives descriptions of some common terms used in the product guide. Term Description GB Gigabyte (1,073,741,824 bytes) Gb Gigabit (1,073,741,824 bits) GHz Gigahertz (one billion hertz) KB Kilobyte (1024 bytes) M
Summary of the content on the page No. 5
Contents 1 Desktop Board Features Desktop Board Components.................................................................................11 Processor..........................................................................................................12 Main Memory.....................................................................................................13 ® Intel G41 Express Chipset .................................................................................14 Graph
Summary of the content on the page No. 6
Intel Desktop Board DG41MJ Product Guide Connecting the Processor Fan Heat Sink Cable................................................31 Removing the Processor ..............................................................................31 Installing and Removing Memory..........................................................................32 Installing DIMMs ........................................................................................33 Removing DIMMs..........................
Summary of the content on the page No. 7
Contents Figures 1. Intel Desktop Board DG41MJ Components ........................................................11 2. LAN Connector LEDs ......................................................................................16 3. Location of the Standby Power Indicator...........................................................21 4. Installing the I/O Shield .................................................................................25 5. Intel Desktop Board DG41MJ Mounting Screw
Summary of the content on the page No. 8
Intel Desktop Board DG41MJ Product Guide viii
Summary of the content on the page No. 9
1 Desktop Board Features ® This chapter briefly describes the features of Intel Desktop Board DG41MJ. Table 1 summarizes the major features of the Desktop Board. Table 1. Feature Summary Mini-ITX (170.18 millimeters [6.70 inches] x 170.18 millimeters Form Factor [6.70 inches]) ® Processor Support for an Intel processor in the LGA775 package Main Memory • Two 240-pin, DDR2 SDRAM Dual Inline Memory Module (DIMM) sockets • 800/667 MHz single or dual channel DDR2 SDRAM interface • Su
Summary of the content on the page No. 10
Intel Desktop Board DG41MJ Product Guide Table 1. Feature Summary (continued) ® • Intel Platform Innovation Framework for extensible firmware BIOS interface • 8 Mb symmetrical flash memory device • Support for SMBIOS ® • Intel Rapid BIOS Boot ® • Intel Express BIOS Update Power Management • Support for Advanced Configuration and Power Interface (ACPI) • Suspend to RAM (STR) • Wake on USB, LAN, PS/2, and front panel • ENERGY STAR* capable Hardware Monitor • Voltage sense to detect
Summary of the content on the page No. 11
Desktop Board Features Desktop Board Components Figure 1 shows the approximate location of the major components on Intel Desktop Board DG41MJ. Figure 1. Intel Desktop Board DG41MJ Components 11
Summary of the content on the page No. 12
Intel Desktop Board DG41MJ Product Guide Table 2. Intel Desktop Board DG41MJ Components Label Description A Front panel audio header B Back panel connectors C 12 V processor core voltage connector (2 x 2 pin) D High-speed USB 2.0 headers (2) E BIOS configuration jumper block F Alternate front panel power LED header G Processor socket H Chassis fan header I Processor fan header J Serial port header K Main power connector (2 x 12 pin) L Battery M Speaker N DDR2 Channel B
Summary of the content on the page No. 13
Desktop Board Features Main Memory NOTE ® To be fully compliant with all applicable Intel SDRAM memory specifications, the board should be populated with DIMMs that support the Serial Presence Detect (SPD) data structure. If your memory modules do not support SPD, you will see a notification to this effect on the screen at power up. The BIOS will attempt to configure the memory controller for normal operation. The Desktop Board has two DIMM sockets that support the memory feat
Summary of the content on the page No. 14
Intel Desktop Board DG41MJ Product Guide ® Intel G41 Express Chipset The Intel G41 Express Chipset consists of the following devices: • Intel G41 Express Chipset Graphics and Memory Controller Hub (GMCH) with Direct Media Interface (DMI) • Intel 82801GB I/O Controller Hub (ICH7) with DMI The GMCH component provides interfaces to the processor, memory, PCI, and the DMI interconnect. The component also provides integrated graphics capabilities supporting 3D, 2D, and display capabilities
Summary of the content on the page No. 15
Desktop Board Features Audio Subsystem The onboard audio subsystem consists of the following: ® • Intel ICH7 • Realtek ALC888VC audio codec • Back panel audio connectors (see Figure 19) • Front panel audio header supporting both Intel High Definition Audio and AC ’97 Audio (see Figure 18, A) The audio subsystem supports the following features: • A signal-to-noise (S/N) ratio of 95 dB • Independent 5.1 audio playback from the back panel connectors and stereo playback from the Intel
Summary of the content on the page No. 16
Intel Desktop Board DG41MJ Product Guide LAN Subsystem The LAN subsystem includes: • Intel ICH7 • Realtek 8111D-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 Two LEDs are built into the RJ-45 LAN connector located on the back panel (see Figure 2). These LEDs indicate the status
Summary of the content on the page No. 17
Desktop Board Features USB 2.0 Support The Desktop Board supports up to eight USB 2.0 ports (four ports routed to the back panel and four ports routed to two internal headers) via ICH7. USB 2.0 ports are backward compatible with USB 1.1 devices. USB 1.1 devices will function normally at USB 1.1 speeds. USB 2.0 support requires both an operating system and drivers that fully support USB 2.0 transfer rates. Disabling Hi-Speed USB in the BIOS reverts all USB 2.0 ports to USB 1.1 operati
Summary of the content on the page No. 18
Intel Desktop Board DG41MJ Product Guide Security Passwords The BIOS includes security features that restrict whether the BIOS Setup program can be accessed and who can boot the computer. A supervisor password and a user password can be set for the BIOS Setup and for booting the computer, with the following restrictions: • The supervisor password gives unrestricted access to view and change all Setup options. If only the supervisor password is set, pressing at the password pr
Summary of the content on the page No. 19
Desktop Board Features Power Management Features Power management is implemented at several levels, including: • Software support through the Advanced Configuration and Power Interface (ACPI) • Hardware support: ⎯ Power connectors ⎯ Fan headers ⎯ LAN wake capabilities ⎯ Instantly Available PC technology (Suspend to RAM) ⎯ +5 V standby power indicator LED ⎯ Wake from USB ⎯ Power Management Event signal (PME#) wake-up support ⎯ Wake from PS/2 devices ⎯ Wake from serial port • ENERGY
Summary of the content on the page No. 20
Intel Desktop Board DG41MJ Product Guide Fan Headers The function/operation of the fans is as follows: • The fans are on when the computer is in the ACPI S0 state. • The fans are off when the computer is in the ACPI S3, S4, or S5 state. • The processor fan header is wired to a fan tachometer input. The chassis fan header has an independent tachometer input to the hardware monitoring and fan control device. • All fan headers support closed-loop fan control that can adjust the fan speed
