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G41A
User Manual
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IEI Integration G41A User Manual

IMB-G41A Micro-ATX Motherboard
IEI Technology Corp.
MODEL:
IMB-G41A
MicroATX LGA775 Motherboard for Intel® Core™ 2
SATA, IDE, Parallel port, PCI, PCIe x1, PCIe x16, USB, HD
Audio, RoHS Compliant
User Manual
Rev. 1.01 – 22 June, 2010
Page i
Date Version Changes
22 June, 2010 1.01 Minor edit
1 February, 2010 1.00 Initial release
IMB-G41A Micro-ATX Motherboard
Revision
Page ii
IMB-G41A Micro-ATX Motherboard
COPYRIGHT NOTICE
The information in this document is subject to change without prior notice in order to improve reliability, design and function and does not represent a commitment on the part of the manufacturer.
In no event will the manufacturer be liable for direct, indirect, special, incidental, or consequential damages arising out of the use or inability to use the product or documentation, even if advised of the possibility of such damages.
This document contains proprietary information protected by copyright. All rights are
Copyright
reserved. No part of this manual may be reproduced by any mechanical, electronic, or other means in any form without prior written permission of the manufacturer.
TRADEMARKS
All registered trademarks and product names mentioned herein are used for identification purposes only and may be trademarks and/or registered trademarks of their respective owners.
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IMB-G41A Micro-ATX Motherboard
Table of Contents
1 INTRODUCTION.......................................................................................................... 1
1.1 INTRODUCTION........................................................................................................... 2
1.2 BENEFITS ................................................................................................................... 2
1.3 FEATURES................................................................................................................... 3
1.4 CONNECTORS ............................................................................................................. 4
1.5 DIMENSIONS............................................................................................................... 5
1.6 DATA FLOW................................................................................................................ 6
1.7 TECHNICAL SPECIFICATIONS ...................................................................................... 7
2 PACKING LIST............................................................................................................. 9
2.1 ANTI-STATIC PRECAUTIONS ...................................................................................... 10
2.2 UNPACKING PRECAUTIONS....................................................................................... 10
2.3 PACKING LIST............................................................................................................11
2.4 OPTIONAL ITEMS...................................................................................................... 12
3 CONNECTORS ........................................................................................................... 14
3.1 PERIPHERAL INTERFACE CONNECTORS..................................................................... 15
3.1.1 IMB-G41A Layout............................................................................................ 15
3.1.2 Peripheral Interface Connectors ..................................................................... 16
3.1.3 External Interface Panel Connectors............................................................... 17
3.2 INTERNAL PERIPHERAL CONNECTORS...................................................................... 17
3.2.1 ATX Power Connector ..................................................................................... 17
3.2.2 CD-In Connector ............................................................................................. 19
3.2.3 CPU Fan Connector........................................................................................ 20
3.2.4 CPU Power Input Connector........................................................................... 21
3.2.5 Digital I/O Connector...................................................................................... 22
3.2.6 Front Panel Audio Connector.......................................................................... 23
3.2.7 Front Panel Connector.................................................................................... 24
3.2.8 Infrared Interface Connector........................................................................... 25
3.2.9 Memory Card Slot............................................................................................ 26
3.2.10 Northbridge Fan Connector .......................................................................... 27
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IMB-G41A Micro-ATX Motherboard
3.2.11 Parallel ATA (IDE) Connector....................................................................... 28
3.2.12 PCI Card Slot................................................................................................. 29
3.2.13 PCI Express Power........................................................................................ 30
3.2.14 PCI Express x1 Slot........................................................................................ 31
3.2.15 PCI Express x16 Slot...................................................................................... 33
3.2.16 SATA Drive Connectors ................................................................................. 35
3.2.17 Serial Port Connector, RS-232/422/485 ........................................................ 36
3.2.18 Serial Port Connectors, RS-232..................................................................... 37
3.2.19 S/PDIF Connector ......................................................................................... 38
3.2.20 System Fan Connector................................................................................... 39
3.2.21 USB Connectors............................................................................................. 40
3.3 EXTERNAL PERIPHERAL INTERFACE CONNECTOR PANEL ......................................... 41
3.3.1 Audio Connector .............................................................................................. 41
3.3.2 Keyboard/Mouse Connector............................................................................ 42
3.3.3 LAN Connector ................................................................................................ 43
3.3.4 Parallel Port Connector .................................................................................. 43
3.3.5 Serial Port Connectors (COM1)...................................................................... 44
3.3.6 USB Connector ................................................................................................ 45
3.3.7 VGA Connector................................................................................................ 46
4 INSTALLATION ......................................................................................................... 47
4.1 ANTI-STATIC PRECAUTIONS ...................................................................................... 48
4.2 INSTALLATION CONSIDERATIONS.............................................................................. 48
4.2.1 Socket LGA775 CPU Installation.................................................................... 50
4.2.2 Socket LGA775 Cooling Kit Installation ......................................................... 53
4.2.3 DIMM Installation........................................................................................... 55
4.3 JUMPER SETTINGS .................................................................................................... 56
4.3.1 AT/ATX Power Mode ....................................................................................... 57
4.3.2 Clear CMOS Jumper........................................................................................ 57
4.3.3 COM Pin 9 Setting Jumper (COM7~COM10) ................................................ 58
4.3.4 COM Pin 9 Setting Jumper (COM7~COM10) ................................................ 59
4.4 INTERNAL PERIPHERAL DEVICE CONNECTIONS........................................................ 60
4.4.1 SATA Drive Connection ................................................................................... 60
4.4.2 USB Cable (Dual Port) with Slot Bracket (Optional) ..................................... 62
4.5 EXTERNAL PERIPHERAL INTERFACE CONNECTION ................................................... 63
Page v
4.5.1 Audio Connector .............................................................................................. 63
4.5.2 LAN Connection............................................................................................... 64
4.5.3 Parallel Device Connection............................................................................. 65
4.5.4 PS/2 Keyboard and Mouse Connection........................................................... 66
4.5.5 Serial Device Connection ................................................................................ 67
4.5.6 USB Connection (Dual Connector)................................................................. 68
4.5.7 VGA Monitor Connection ................................................................................ 69
4.6 SOFTWARE INSTALLATION........................................................................................ 70
5 BIOS.............................................................................................................................. 72
5.1 INTRODUCTION......................................................................................................... 73
5.1.1 Starting Setup................................................................................................... 73
5.1.2 Using Setup...................................................................................................... 73
5.1.3 Getting Help..................................................................................................... 74
5.1.4 Unable to Reboot after Configuration Changes.............................................. 74
IMB-G41A Micro-ATX Motherboard
5.1.5 BIOS Menu Bar................................................................................................ 74
5.2 MAIN........................................................................................................................ 75
5.3 ADVANCED............................................................................................................... 76
5.3.1 CPU Configuration.......................................................................................... 77
5.3.2 IDE Configuration........................................................................................... 78
5.3.2.1 IDE Master, IDE Slave............................................................................. 80
5.3.3 Super IO Configuration ................................................................................... 85
5.3.4 Hardware Health Configuration...................................................................... 95
5.3.5 Power Configuration ....................................................................................... 97
5.3.5.1 ACPI Settings............................................................................................ 98
5.3.5.2 APM Configuration................................................................................... 99
5.3.6 Remote Access Configuration........................................................................ 101
5.3.7 USB Configuration......................................................................................... 104
5.4 PCI/PNP................................................................................................................. 106
5.5 BOOT...................................................................................................................... 108
5.5.1 Boot Settings Configuration........................................................................... 109
5.5.2 Boot Device Priority.......................................................................................111
5.5.3 Hard Disk Drives............................................................................................112
5.5.4 Removable Drives...........................................................................................113
5.5.5 CD/DVD Drives..............................................................................................113
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IMB-G41A Micro-ATX Motherboard
5.6 SECURITY................................................................................................................114
5.7 CHIPSET ..................................................................................................................115
5.7.1 Northbridge Configuration.............................................................................116
5.7.2 Southbridge Configuration .............................................................................118
5.8 EXIT........................................................................................................................119
A BIOS OPTIONS ........................................................................................................ 121
B TERMINOLOGY...................................................................................................... 125
C DIGITAL I/O INTERFACE..................................................................................... 129
C.1 INTRODUCTION...................................................................................................... 130
C.2 DIO CONNECTOR PINOUTS.................................................................................... 130
C.3 ASSEMBLY LANGUAGE SAMPLES........................................................................... 130
C.3.1 Enable the DIO Input Function..................................................................... 130
C.3.2 Enable the DIO Output Function.................................................................. 130
D WA TCHDOG TIMER .............................................................................................. 131
E COMPATIBILITY.................................................................................................... 134
E.1 COMPATIBLE OPERATING SYSTEMS........................................................................ 135
E.2 COMPATIBLE PROCESSORS..................................................................................... 135
F HAZARDOUS MATERIALS DISCLOSURE........................................................ 136
F.1 HAZARDOUS MATERIALS DISCLOSURE TABLE FOR IPB PRODUCTS CER TIFIED AS
ROHS COMPLIANT UNDER 2002/95/EC WITHOUT MERCURY ..................................... 137
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IMB-G41A Micro-ATX Motherboard
List of Figures
Figure 1-1: IMB-G41A.....................................................................................................................2
Figure 1-2: Connectors ..................................................................................................................4
Figure 1-3: IMB-G41A Dimensions (mm)......................................................................................5
Figure 1-4: Data Flow Diagram......................................................................................................6
Figure 3-1: Connectors and Jumpers.........................................................................................15
Figure 3-2: ATX Power Connector Pinout Locations................................................................18
Figure 3-3: Audio CD In Connector Pinouts (4-pin)..................................................................19
Figure 3-4: CPU Fan Connector Location..................................................................................20
Figure 3-5: CPU Power Input Connector Location....................................................................21
Figure 3-6: Digital I/O Connector Locations ..............................................................................22
Figure 3-7: Audio Connector Pinouts.........................................................................................23
Figure 3-8: Front Panel Connector Location .............................................................................24
Figure 3-9: Infrared Connector Location....................................................................................25
Figure 3-10: Memory Card Slot Location ...................................................................................26
Figure 3-11: Northbridge Fan Connector Location...................................................................27
Figure 3-12: Parallel ATA (IDE) Connector Location ................................................................28
Figure 3-13: PCI Card Slot Location...........................................................................................30
Figure 3-14: PCIe Power ..............................................................................................................31
Figure 3-15: PCIe x1 Slot Location .............................................................................................32
Figure 3-16: PCIe x16 Slot Location ...........................................................................................33
Figure 3-17: SATA Drive Connector Location...........................................................................35
Figure 3-18: Serial Port Connector Location.............................................................................36
Figure 3-19: Serial Port Connector Location.............................................................................37
Figure 3-20: SPDIF Connector Location ....................................................................................38
Figure 3-21: System Fan Connector Location...........................................................................39
Figure 3-22: USB Connector Pinout Locations.........................................................................40
Figure 3-23: External Peripheral Interface Connector..............................................................41
Figure 3-24: Audio Connector.....................................................................................................42
Figure 3-25: PS/2 Pinouts............................................................................................................43
Figure 3-26: Parallel Port Connector Pinouts............................................................................44
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IMB-G41A Micro-ATX Motherboard
Figure 3-27: Serial Port Pinouts..................................................................................................45
Figure 3-28: VGA Connector .......................................................................................................46
Figure 4-1: Intel LGA775 Socket .................................................................................................50
Figure 4-2: Remove Protective Cover.........................................................................................51
Figure 4-3: CPU Socket Load Plate.............................................................................................51
Figure 4-4: Insert the Socket LGA775 CPU................................................................................52
Figure 4-5: Cooling Kits (CF-520 and CF-775A) ........................................................................53
Figure 4-6: Securing the Heat sink to the IMB-G41A................................................................54
Figure 4-7: DIMM Installation.......................................................................................................55
Figure 4-8: AT/ATX Power Mode Jumper Location...................................................................57
Figure 4-9: Clear BIOS Jumper Location ...................................................................................58
Figure 4-10: COM 1 Pin 9 Setting Jumper Location..................................................................59
Figure 4-11: COM 1 Pin 9 Setting Jumper Location..................................................................60
Figure 4-12: SATA Drive Cable Connection...............................................................................61
Figure 4-13: SATA Power Drive Connection..............................................................................62
Figure 4-14: Dual USB Cable Connection..................................................................................63
Figure 4-15: Audio Connector.....................................................................................................64
Figure 4-16: LAN Connection......................................................................................................65
Figure 4-17: Parallel Device Connector......................................................................................66
Figure 4-18: PS/2 Keyboard/Mouse Connector.........................................................................67
Figure 4-19: Serial Device Connector.........................................................................................68
Figure 4-20: USB Connector........................................................................................................69
Figure 4-21: VGA Connector .......................................................................................................70
Figure 4-22: Introduction Screen................................................................................................71
Figure 4-23: Available Drivers.....................................................................................................71
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IMB-G41A Micro-ATX Motherboard
List of Tables
Table 1-1: IMB-G41A Specifications.............................................................................................8
Table 2-1: Packing List.................................................................................................................12
Table 2-2: Optional Items.............................................................................................................13
Table 3-1: Peripheral Interface Connectors...............................................................................16
Table 3-2: Rear Panel Connectors..............................................................................................17
Table 3-3: ATX Power Connector Pinouts .................................................................................18
Table 3-4: Audio CD In Connector Pinouts................................................................................19
Table 3-5: CPU Fan Connector Pinouts......................................................................................20
Table 3-6: CPU Power Input Connector Pinouts.......................................................................21
Table 3-7: Digital I/O Connector Pinouts....................................................................................22
Table 3-8: Front Panel Audio Connector Pinouts .....................................................................24
Table 3-9: Front Panel Connector Pinouts.................................................................................25
Table 3-10: Infrared Connector Pinouts.....................................................................................26
Table 3-11: Northbridge Fan Connector Pinouts ......................................................................27
Table 3-12: Parallel ATA (IDE) Connector Pinouts....................................................................29
Table 3-13: PCIe Power................................................................................................................31
Table 3-14: PCIe x1 Slot Pinouts.................................................................................................33
Table 3-15: PCIe x16 Side A Pinouts ..........................................................................................34
Table 3-16: PCIe x16 Side B Pinouts ..........................................................................................35
Table 3-17: Serial Port Connector Pinouts ................................................................................36
Table 3-18: Serial Port Connector Pinouts ................................................................................38
Table 3-19: SPDIF Connector Pinouts........................................................................................39
Table 3-20: System Fan Connector Pinouts..............................................................................40
Table 3-21: USB Port Connector Pinouts...................................................................................41
Table 3-22: PS/2 Connector Pinouts...........................................................................................42
Table 3-23: LAN Pinouts ..............................................................................................................43
Table 3-24: Parallel Port Connector Pinouts .............................................................................44
Table 3-25: Serial Port Pinouts....................................................................................................45
Table 3-26: USB Port Pinouts......................................................................................................45
Table 3-27: VGA Connector Pinouts...........................................................................................46
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IMB-G41A Micro-ATX Motherboard
Table 4-1: Jumpers.......................................................................................................................56
Table 4-2: AT/ATX Power Mode Jumper Settings.....................................................................57
Table 4-3: Clear BIOS Jumper Settings......................................................................................58
Table 4-4: COM 1 Pin 9 Setting Jumper Settings......................................................................59
Table 4-5: COM 1 Pin 9 Setting Jumper Settings......................................................................60
Table 5-1: BIOS Navigation Keys................................................................................................74
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IMB-G41A Micro-ATX Motherboard
BIOS Menus
BIOS Menu 1: Main.......................................................................................................................75
BIOS Menu 2: Advanced..............................................................................................................77
BIOS Menu 3: CPU Configuration...............................................................................................77
BIOS Menu 4: IDE Configuration.................................................................................................79
BIOS Menu 5: IDE Master and IDE Slave Configuration...........................................................81
BIOS Menu 6: Super IO Configuration........................................................................................86
BIOS Menu 7: Hardware Health Configuration..........................................................................95
BIOS Menu 8: ACPI Configuration..............................................................................................98
BIOS Menu 9: ACPI Settings .......................................................................................................98
BIOS Menu 10: APM Configuration.............................................................................................99
BIOS Menu 11: Remote Access Configuration....................................................................... 102
BIOS Menu 12: USB Configuration.......................................................................................... 104
BIOS Menu 13: PCI/PnP Configuration.................................................................................... 106
BIOS Menu 14: Boot.................................................................................................................. 108
BIOS Menu 15: Boot Settings Configuration.......................................................................... 109
BIOS Menu 16: Boot Device Priority Settings ........................................................................ 111
BIOS Menu 17: Hard Disk Drives ............................................................................................. 112
BIOS Menu 18: Removable Drives........................................................................................... 113
BIOS Menu 19: CD/DVD Drives ................................................................................................ 114
BIOS Menu 20: Security............................................................................................................ 114
BIOS Menu 21: Chipset............................................................................................................. 116
BIOS Menu 22:Northbridge Chipset Configuration................................................................ 116
BIOS Menu 23: Southbridge Chipset Configuration.............................................................. 118
BIOS Menu 24: Exit.................................................................................................................... 119
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IMB-G41A Micro-ATX Motherboard
Chapter
1

1 Introduction

Page 1

1.1 Introduction

IMB-G41A Micro-ATX Motherboard
Figure 1-1: IMB-G41A
The IMB-G41A is a MicroATX motherboard. It accepts a Socket LGA775 Intel® Core™ 2 Duo/Quad/Extreme processor and supports two 800/1066/1333 MHz Dual-channel DDR3 DIMM modules up to 4.0 GB each. The IMB-G41A includes a VGA port. Expansion and I/O include two PCI card slots, a PCIe x16 card slot, a PCIe x1 card slot, High Definition audio, four USB ports on the rear panel, four USB ports via pin headers, four SATA connectors, a LPT port, and a keyboard/mouse connector.

1.2 Benefits

Some of the IMB-G41A motherboard benefits include:
Powerful graphics with multiple monitors  Staying connected with both wired LAN connections  Speedy running of multiple programs and applications
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IMB-G41A Micro-ATX Motherboard

1.3 Features

Some of the IMB-G41A motherboard features are listed below:
 Micro-ATX  RoHS compliant  LGA 775 CPU socket  800/1066/1333 MHz Front Side Bus  Two PCI card expansion slots  One PCIe x16 card expansion slot  One PCIe x1 card expansion slot  Supports two dual-channel DDR3 DIMMs  One external RS-232 serial port  Eight internal RS-232 serial ports connectors  One internal RS-232/422/485 serial port connector  Two Gigabit Ethernet connectors  Four SATA connectors  High Definition audio  Intel® GMA X4500 for DX1 0 and OpenGL 2.0 support
Page 3

1.4 Connectors

The connectors on the IMB-G41A are shown in the figure below.
IMB-G41A Micro-ATX Motherboard
Figure 1-2: Connectors
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IMB-G41A Micro-ATX Motherboard

1.5 Dimensions

The main dimensions of the IMB-G41A are shown in the diagram below.
Figure 1-3: IMB-G41A Dimensions (mm)
Page 5

1.6 Data Flow

5Figure 1-4 shows the data flow between the system chipset, the CPU and other
components installed on the motherboard.
IMB-G41A Micro-ATX Motherboard
Figure 1-4: Data Flow Diagram
Page 6
IMB-G41A Micro-ATX Motherboard

1.7 Technical Specifications

IMB-G41A technical specifications are listed below.
Specification/Model IMB-G41A
Form Factor CPU Supported Front Side Bus (FSB) Northbridge Chipset Integrated Graphics
Memory
Southbridge Chipset Audio BIOS Digital I/O Ethernet Controllers
MicroATX LGA775 Socket Intel® Core™ 2 Duo/Quad/Extreme 800 MHz, 1066 MHz or 1333 MHz Intel® G41 Intel® GMA X4500
Up to 2048 x 1536 32-bit color @ 75 Hz refresh Supports DirectX 10/OpenGL 2.0
Two 240-pin dual-ch annel 800/1066/1333 MHz DDR3 DIMMs up to
4.0 GB each Intel® ICH7 Realtek ALC888 HD Audio codec AMI BIOS 8-bit, 4-bit input/4-bit output Two Realtek RTL8111CP
Super I/O Controller Watchdog Timer Expansion PCI PCIe
I/O Interface Connectors Audio Connectors
Display port
ITE IT8783F Software programmable supports 1~2 55 sec. system reset
Two PCI slots One PCIe x1 slot
One PCIe x16 slot
One external audio jack (line-in, line-out, mic-in) One internal front panel audio connector One internal S/PDIF connector
One VGA
Page 7
Specification/Model IMB-G41A
IMB-G41A Micro-ATX Motherboard
Ethernet Keyboard/Mouse LPT Serial Ports
USB 2.0/1.1 ports
Parallel ATA (IDE) Serial ATA
Environmental and Power Specifications Power Supply Power Consumption
Two RJ-45 ports Dual PS/2 port One IEEE 1284 parallel port (supports normal, EPP and ECP modes) One RS-232 serial port
One RS-232/422/485 via internal box pin headers Eight RS-232 via internal box pin headers
Four USB ports Four USB ports by internal pin headers
One Parallel ATA (IDE) connector Four independent Serial ATA (SATA) channels with 3.0 Gb/s data
transfer rates
ATX supported 5V @ 7.26A, 12V @ 0.26A, Vcore_12V @ 3.24A, 3.3V @ 0.16A
3.16GHz Intel® Core™2 Duo E8500 with 2GB x 2 DDR3 800MHz
Operating temperature
Humidity Physical Specifications Dimensions Weight GW/NW
Table 1-1: IMB-G41A Specifications
0ºC ~ 60ºC/32°F ~ 140°F (requires cooler and silicone heat sink paste)
5% ~ 95% (non-condensing)
244 mm x 244 mm 1200 g / 700 g
Page 8
IMB-G41A Micro-ATX Motherboard
Chapter
2

2 Packing List

Page 9

2.1 Anti-static Precautions

WARNING!
Static electricity can destroy certain electronics. Make sure to follow the ESD precautions to prevent damage to the product, and injury to the user.
Make sure to adhere to the following guidelines:
Wear an anti-static wristband: Wearing an anti-static wristband can prevent
electrostatic discharge.
Self-grounding: Touch a grounded conductor every few minutes to discharge
any excess static buildup.
IMB-G41A Micro-ATX Motherboard
Use an anti-static pad: When configuring any circuit board, place it on an
anti-static mat.
Only handle the edges of the PCB: Don't touch the surface of the
motherboard. Hold the motherboard by the edges when handling.

2.2 Unpacking Precautions

When the IMB-G41A is unpacked, please do the following:
Follow the antistatic guidelines above.  Make sure the packing box is facing upwards whe n opening.  Make sure all the packing list items are present.
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IMB-G41A Micro-ATX Motherboard

2.3 Packing List

NOTE:
If any of the components listed in the checklist below are missing, do not proceed with the installation. Contact the IEI reseller or vendor the IMB-G41A was purchased from or contact an IEI sales representative directly by sending an email to 32sales@iei.com.tw.
The IMB-G41A is shipped with the following components:
Quantity Item and Part Number Image
1 IMB-G41A
2 Quad ports RS-232 cable without bracket
(P/N: 32205-001202-100-RS)
4 SATA cable
(P/N: 32000-062800-RS)
1 I/O shielding
(P/N: 45014-0017C0-00-RS)
1 Mini jumper pack (2.54mm)
(P/N:33100-000079-RS)
1 Utility CD
Page 11
Quantity Item and Part Number Image
1 Quick Installation Guide
Table 2-1: Packing List

2.4 Optional Items

The following are optional components which may be separately purchased:
Item and Part Number Image
CPU cooler kit (P/N: CF-520-RS)
IMB-G41A Micro-ATX Motherboard
CPU cooler kit (P/N: CF-775A-RS)
PCIe 16X SDVO interface DVI graphic card (P/N: SDVO-100DVI-R10)
PCIe 16X SDVO interface VGA graphic card (P/N: SDVO-100VGA-R10)
RS-232/422/485 Cable (P/N: 32200-000063-RS)
Page 12
IMB-G41A Micro-ATX Motherboard
Item and Part Number Image
Dual USB cable (with bracket) (P/N: CB-USB02A-RS)
SATA power cable (P/N: 32100-088600-RS)
Table 2-2: Optional Items
Page 13
IMB-G41A Micro-ATX Motherboard
Chapter
3

3 Connectors

Page 14
IMB-G41A Micro-ATX Motherboard

3.1 Peripheral Interface Connectors

This chapter details all the jumpers and connectors.

3.1.1 IMB-G41A Layout

The figures below show all the connectors and jumpers.
Figure 3-1: Connectors and Jumpers
Page 15

3.1.2 Peripheral Interface Connectors

The table below lists all the connectors on the board.
Connector Type Label
ATX Power 24-pin A TX (2x12) PWR1 CD-In 4-pin header CD_IN1 CPU fan 4-pin wafer CPU_FAN1 CPU power 4-pin box header CPU12V1 Digital I/O 10-pin header DIO1 Front panel 10-pin hea der F_PANEL1 Front panel audio 9-pin header FP_AUDIO1 Infrared interface 5-pin header IR1
IMB-G41A Micro-ATX Motherboard
Memory card DIMM slot DIMM1, DIMM2 Northbridge fan 3-pin wafer NB_FAN1 Parallel A T A (IDE) 40-pin box he ader PIDE1 PCI card slot PCI card slot PCI1, PCI2 PCI-E power 4-pin molex PCIE_12V1 PCIe x1 slot PCIe x1 card slot PCIEX1_1 PCIe x16 slot PCIe x16 card slot PCIEX16_1 S/PDIF 5-pin header SPDIF1 SATA 7-pin SATA connector SATA1~4 Serial port, RS-232 40-pin box headers COM3-6, COM7-10 Serial port, RS-232/422/485 14-pin box headers COM2 System fan 3-pin wafer SYS_FAN1, USB 8-pin headers (2x4) USB45, USB67
Table 3-1: Peripheral Interface Connectors
Page 16
IMB-G41A Micro-ATX Motherboard

3.1.3 External Interface Panel Connectors

The table below lists the connectors on the external I/O panel.
Connector Type Label
Audio Audio jack AUDIO_CV1 COM1, LPT, and VGA ports 9-pin male DB-9,
25-pin male DB-25,
15-pin female DE15 Keyboard/Mouse Dual PS/2 KBMS1 Ethernet and USB ports RJ-45, USB LAN1_USB_01
Table 3-2: Rear Panel Connectors

3.2 Internal Peripheral Connectors

The section describes all of the connectors on the IMB-G41A.

3.2.1 ATX Power Connector

CN Label: PWR1 CN Type:
24-pin A TX (2x12)
3IN1_DSUB1
LAN2_USB_23
Figure 3-2
CN Location: CN Pinouts:
The ATX power connector connects to an ATX power supply.
See See
Table 3-3
Page 17
IMB-G41A Micro-ATX Motherboard
Figure 3-2: ATX Power Connector Pinout Locations
Pin Description Pin Description
1 +3.3 V 13 +3.3 V 2 +3.3 V 14 -12 V 3 GND 15 GND 4 +5 V 16 PS-ON 5 GND 17 GND 6 +5 V 18 GND 7 GND 19 GND 8 PW-OK 20 NC 9 +VCC5SB 21 +5 V 10 +12 V 22 +5 V 11 +12 V 23 +5 V 12 +3.3 V 24 GND
Page 18
Table 3-3: ATX Power Connector Pinouts
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