JETWAY 845CA, 845CAL User Manual
845CA/845CAL
USER'S MANUAL
M/B For Socket 478 Pentium 4 Processor
NO. G03-845CAR1A
Release date: January 2002
Trademark:
* Specifications and Information contained in this documentation are furnished for information use only, and are
subject to change at any time without notice, and should not be construed as a commitment by manufacturer.
i
USER’S NOTICE................................................................................ii
MANUAL REVISION INFORMATION..............................................1
COOLING SOLUTIONS ...................................................................1
CHAPTER 1 INTRODUCTION OF 845CA/845CAL MOTHERBOARD
1-1 FEATURE OF MOTHERBOARD ...............................................2
1-2 SPECIFICATION .................................................................... 3
1-3 PERFORMANCE LIST.............................................................4
1-4 LAYOUT DIAGRAM & JUMPER SETTING ................................5
CHAPTER 2 HARDWARE INSTALLATION
2-1 HARDWARE INSTALLATION STEPS........................................ 7
2-2 CHECKING MOTHERBAORD'S JUMPER SETTING....................7
2-3 INSTALL CPU........................................................................8
2-3-1 GLOSSARY ..................................................................8
2-3-2 ABOUT INTEL PENTIUM 4 478-PIN CPU..........................9
2-4 INSTALL MEMORY................................................................10
2-5 EXPANSION CARD.................................................................11
2-5-1 PROCEDURE FOR EXPANSION CARD INSTALLATION .............11
2-5-2 ASSIGNING IRQ FOR EXPANSION CARD.................................
11
2-5-3 INTERRUPT REQUEST TABLE FOR THIS MOTHERBOARD.......
12
2-5-4 AGP SLOT ............................................................................
12
2-6 CONNECTORS, HEADERS.......................................................13
2-6-1 CONNECTORS ......................................................................
13
2-6-2 HEADERS.............................................................................16
2-7 STARTING UP YOUR COMPUTER ........................................... 20
CHAPTER 3 INTRODUCING BIOS
3-1 ENTERING SETUP..................................................................21
3-2 GETTING HELP ..................................................................... 22
3-3 THE MAIN MENU...................................................................22
3-4 STANDARD CMOS FEATURES.................................................23
3-5 ADVANCED BIOS FEATURES..................................................25
3-6 ADVANCED CHIPSET FEATURES............................................ 27
3-6-1 DRAM TIMING SETTINGS.............................................28
3-7 INTEGRATED PERIPHERALS.................................................. 28
3-7-1 ONCHIP IDE FUNCTION ...............................................29
3-7-2 ONCHIP DEVICE FUNCTION ......................................... 30
3-7-3 ONCHIP SUPER IO FUNCTION ......................................31
3-8 POWER MANAGEMENT SETUP...............................................32
3-8-1 PM TIMER RELOAD EVENTS........................................34
3-9 PNP/PCI CONFIGURATION SETUP ..........................................34
3-9-1 IRQ RESOURCES .........................................................35
TABLE OF CONTENT
ii
3-10 PC HEALTH STATUS.............................................................36
3-11 MISCELLANEOUS CONTROL.................................................37
3-12 LOAD STANDARD/OPTIMIZED DEFAULTS ............................. 38
3-13 SET SUPERVISOR/USER PASSWORD ......................................38
CHAPTER 4 DRIVER & FREE PROGRAM INSTALLATION
MAGIC INSTALL SUPPORTS WINDOWS 95/98/98SE/NT4.0/2000......... 39
4-1 INF
INSTALL INTEL 845 CHIPSET SYSTEM DRIVER
............40
4-2 SOUND
INSTALL ALC201 AUDIO CODEC DRIVER
...................41
4-3 LAN
INSTALL RTL8100 LAN CONTROLLER DRIVER
............42
4-4 PC-HEALTH
INTEL 845 PC-HEALTH MONITOR
...............................43
4-4-1
HOW TO UTILIZE PC-HEALTH
.......................................44
4-5 MAGIC BIOS
INSTALL BIOS LIVE UPDATE UTILITY
........................45
4-6 DRICTX8
INSTALL MICROSOFT DIRECTX 8.0 DRIVER
................46
4-7 IAA
INSTALL
INTEL APPLICATION ACCELERATOR SOFTWARE
47
4-8 PC-CILLIN
INSTALL PC-CILLIN2000 ANTI-VIRUS PROGRAM
..........47
4-9 HOW TO DISABLE ON-BOARD SOUND .................................... 49
4-10 HOW TO UPDATE BIOS..........................................................49
USER’S NOTICE
COPYRIGHT OF THIS MANUAL BELONGS TO THE MANUFACTURER. NO PART OF THIS
MANUAL, INCLUDING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT MAY BE
REPRODUCED, TRANSMITTED OR TRANSLATED INTO ANY LANGUAGE IN ANY FORM
OR BY ANY MEANS WITHOUT WRITTEN PERMISSION OF THE MANUFACTURER.
THIS MANUAL CONTAINS ALL INFORMATION REQUIRED TO USE 845CA/845CAL
MOTHER-BOARD AND WE DO ASSURE THIS MANUAL MEETS USER’S REQUIREMENT BUT
WILL CHANGE, CORRECT ANY TIME WITHOUT NOTICE. MANUFACTURER PROVIDES
THIS MANUAL “AS IS” WITHOUT WARRANTY OF ANY KIND, AND WILL NOT BE LIABLE
FOR ANY INDIRECT, SPECIAL, INCIDENTIAL OR CONSEQUENTIAL DAMAGES (INCLUDING
DAMANGES FOR LOSS OF PROFIT, LOSS OF BUSINESS, LOSS OF USE OF DATA,
INTERRUPTION OF BUSINESS AND THE LIKE).
PRODUCTS AND CORPORATE NAMES APPEARING IN THIS MANUAL MAY OR MAY NOT
BE REGISTERED TRADEMARKS OR COPYRIGHTS OF THEIR RESPECTIVE COMPANIES,
AND THEY ARE USED ONLY FOR IDENTIFICATION OR EXPLANATION AND TO THE
OWNER’S BENEFIT, WITHOUT INTENT TO INFRINGE.
1
Manual Revision Information
Reversion Revision History Date
1.0 First Release January 2002
Item Checklist
845CA/845CAL
Cable for IDE/Floppy
CD for motherboard utilities
□
Cable for USB Port 3/4 (Option)
845CA/845CAL User’s Manual
Intel Pentium 4 Processor Family
Cooling Solutions
As processor technology pushes to faster speeds and higher performance, thermal
management becomes increasingly crucial when building computer systems.
Maintaining the proper thermal environment is key to reliable, long-term system
operation. The overall goal in providing the proper thermal environment is keeping
the processor below its specified maximum case temperature. Heatsinks induce
improved processor heat dissipation through increased surface area and concentrated
airflow from attached fans. In addition, interface materials allow effective transfers
of heat from the processor to the heatsink. For optimum heat transfer, Intel
recommends the use of thermal grease and mounting clips to attach the heatsink to
the processor.
When selecting a thermal solution for your system, please refer to the website below
for collection of heatsinks evaluated and recommended by Intel for use with Intel
processors. Note, those heatsinks are recommended for maintaining the specified
Maximum T case requirement. In addition, this collection is not intended to be a
comprehensive listing of all heatsinks that support Intel processors.
For vendor list of heatsink and fan, please visit :
http://developer.intel.com/design/Pentium4/components/index
2
Chapter 1
Introduction of 845CA/845CAL Motherboard
1-1 Feature of motherboard
The 845CA/845CAL motherboard is design for use Intel Pentium 4 Processor in 478
Pin Package/Northwood Processor with the Intel 845 Chipset delivers a high
performance and professional desktop platform solution. Which utilize the Socket
478 design and the memory size expandable to 3.0GB.
This motherboard use the newest Intel 845 Chipset Supports 400MHz System Bus in
data transfer rate and 133MHz SDRAM clock frequency support PC133/SDRAM .
The 845CA/845CAL motherboard offers ULTRA ATA 100 to provide speedier
HDD throughout that boosts overall system performance.
The 845CAL motherboard including PCI LAN Controller chip support 10/100
Mb/sec Base transfer rate.
These motherboards also has an integrated AC’97 2.1 CODEC on board which is
fully compatible with Sound Blaster Pro that gives you the best sound quality and
compatibility.
For those wanting even greater graphic perf orman ce, an A GP 4X s lot is i nclud ed on
the board. (For 1.5V AGP card only. No for 3.3V or Universal AGP card).
With USB control as well as capability of expanding to 4 USB function ports, the
845CA/845CAL meet future USB demand also this motherboard has built-in
hardware monitor function. This will monitor and protect your computer. These
motherboards integrated Recovery Genius in BIOS protected your hard disk from
virus crash hard disk data, and special design in hardware to protect BIOS from
virus crash BIOS data.
The 845CA/845CAL motherboard provides special function in BIOS Setup to setting
CPU Host clock step by step increasing let users to approach over clocking.
845CA/845CAL provides high performance & meets future specification demand. It
is really wise choice for your computer.
3
1-2 Specification
Spec Description
Design
∗
ATX form factor 4 layers PCB size: 30.5x21.0cm
Chipset
∗
Intel 845 Memory Controller Hub (MCH) Chipset
∗
Intel 82801BA I/O Controller Hub (ICH2) Chipset
CPU Socket
(mPGA478B Socket)
∗
Support Intel Pentium 4 478 Pin package utilizes Flip-
Chip Pin Grid Array (FC-PGA2) package processor
∗
Support 1.5G∼2.2G 478 Pin Pentium 4 processor
∗
Reserves support for future Intel Pentium 4 processors
Memory Socket
∗
168-pin SDR SDRAM module socket x3
∗
Support PC133 SDRAM
∗
Expandable to 3.0GB
Expansion Slot &
Headers
∗
AGP slot x1 for AGP 1.5V standard only, support AGP
2.0 & 4X mode
∗
32-bit PCI slot x6
∗
CNR slot x1
Integrate IDE
∗
Two PCI IDE controllers support PCI Bus Mastering,
ATA PIO/DMA and the ULTRA DMA 33/66/100
functions that deliver the data transfer rate up to 100
MB/s
LAN On Board
(Only for 845CAL)
∗
Realtek RTL8100 PCI LAN Controller chip
∗
Supports 10/100 Mb/sec data transfer rate
Audio
∗
AC’97 Digital Audio controller integrated
∗
AC’97 Audio CODEC on board
∗
Audio driver and utility included
BIOS
∗
Award 2MB Flash ROM
Multi I/O
∗
PS/2 keyboard and PS/2 mouse connectors
∗
Floppy disk drive connector x1
∗
Parallel port x1
∗
Serial port x2
∗
USB connector x2
∗
USB headers x2 (connecting cable option)
∗
Audio connector (Line-in, Line-out , MIC & Game Port)
4
1-3 Performance List
The following performance data list is the testing result of some popular benchmark
testing programs. These data are just referred by users, and there is no responsibility
for different testing data values gotten by users (the different Hardware & Software
configuration will result in different benchmark testing results.)
Performance Test Report
CPU: Intel Pentium 4 1.5GHz mPGAB package
DRAM: 128M SDRAM x2 (Hyundai GM 72V66841ET75)
VGA Expansion Card: Geforce 256 (1024x768 Hi-color) Driver V3.68
Hard Disk Driver: IBM DTLA-305040 (ATA-100)
BIOS: Award Optimal default
OS: Win 98SE
Performance Test Report
Pentium 4 1.5GHz
3D Mark 99 5998
3D Mark 2000 4706
3D Mark 2001 1881
3D Winbench 99 V1.2 900
3D Winbench 2000 94
Final Reality 7.57
Winstone 99 V1.3 27.3
Content Creation Winstone 2000 37.1
Content Creation Winstone 2001 44.1
Business Winstone2001 39.1
Winbench 99:
CPU Mark 99 85.6
FPU Winmark 99 5130
Business Disk Winmark99 7750
Hi-end Disk Winmark99 20300
Business Graphic Winmark 342
Hi-end Graphic Winmark 973
SYS Mark 2000 : SISMark 2000 Rating (Internet Content Creation / Office
Productivity)
Suites 173 (185/164)
Official 173 (186/163)
SISOFT Sandra 2000 :
Dhrystone ALU MIPS
2790
Whetstone FPU MFLOPS
1843
Int ALU/RAM MB/S
658
Float FPU/RAM MB/S
658
QUAKE3 DEMO1 FPS
131.6
DEMO2 FPS
130.0
5
1-4 Layout Diagram & Jumper Setting
LINE-OUT
LINE-IN
MIC
GAME/MIDI PORT
Winbond 83627HF
Chip
IR Connector
CNR Slot
Front Panel Audio
PC99 Back Panel
CD Audio
PCI Slo
t
AGP Slot
Floppy Connector
Intel 845 Chip
Front Panel Connector
ATA 100 IDE Conn.
Clear CMOS (JP10)
ATX Power Conn.
USB Port
CPU FAN
2MBit Flash ROM BIOS
CPU Socket
PC133 DIMMX3
Wake On Modem
Wake On LAN
SYSFAN2
Intel 82801BA Chip
ATX 12V Power Conn.
USB Port
/LAN Connector
(for 845CAL)
PS2 KB/Mouse Port
SYSFAN
ATX P6 Power Conn.
COM1 COM2
PS/2 MOUSE
PS/2 Keyboard
USB
PRINT LAN
6
Jumpers
Jumper Name Description Page
JP10
CMOS RAM Clear 3-pin Block P.7
Connectors
Connector Name Description Page
ATXPWR ATX Power Connector 20-pin Block P.13
ATX12V ATX 12V Power Connector 4-pin Block P.13
ATXP9 ATX P6 Power Connector 6-pin Block P.14
J1
(PS2 KB/MOUSE)
PS/2 Mouse & PS/2 Keyboard
Connector
6-pin Female P.14
J2 (USB) USB Port Connector 4-pin Connector P.14
LAN LAN Connectors RJ-45 Connector P.14
PARALLEL Parallel Port Connector 25-pin Female P.14
AUD_GAME Audio/Game Connector 3 phone jack + 15-pin Connector P.14
COM1/COM2 Serial Port COM1/2 Connector 9-pin Connector P.15
FDD Floppy Driver Connector 34-pin Block P.15
IDE1/IDE2 Primary/Secondary IDE Connector 40-pin Block P.15
Only for 845CAL
Headers
Header Name Description Page
AUDIO Line-In/Out, MIC header 9-pin Block P.16
USB1 USB Port Headers 9-pin Block P.17
IDE LED IDE activity LED 2-pin Block P.17
TURBO LED Turbo LED switch 2-pin Block P.17
RESET Reset switch lead 2-pin Block P.17
SPKR Speaker connector 4-pin Block P.17
PWR-LED
Power LED 2-pin Block P.17
PWR BTN Power switch 2-pin Block P.17
WOL/WOM Wake On-LAN/Modem Headers 3-pin Block P.18
SYSFAN,SYSFAN2,
CPUFAN
FAN Speed Headers 3-pin Block P.18
IR IR infrared module Headers 5-pin Block P.19
CDIN CD Audio-In Headers 4-pin Block P.19
Expansion Sockets
Socket/Slot Name Description Page
ZIF Socket 478 CPU Socket 478-pin mPGAB CPU Socket P.9
D I M M 1 , D I M M 2 , D I M M 3 SDRAM Module
Socket
168-pin SDR SDRAM Module
Expansion Socket
P.10
PCI1 ∼ PCI6
PCI Slot 32-bit PCI Local Bus Expansion slots P.11
AGP AGP 4X Mode Slot AGP Expansion Slot P.12
CNR CNR Slot Communication Network Riser Slot
7
Chapter 2
Hardware installation
2-1 Hardware installation Steps
Before using your computer, you had better complete the following steps:
1. Check motherboard jumper setting
2. Install CPU and Fan
3. Install System Memory (DIMM)
4. Install Expansion cards
5. Connect IDE and Floppy cables, Front Panel /Back Panel cable
6. Connect ATX Power cable
7. Power-On and Load Standard Default
8. Reboot
9. Install Operating System
10. Install Driver and Utility
2-2 Checking Motherboard’s Jumper Setting
(1) CMOS RAM Clear (3-pin) : JP10
A battery must be used to retain the motherboard configuration in CMOS RAM short
1-2 pins of JP10 to store the CMOS data.
To clear the CMOS, follow the procedure below:
1. Turn off the system and unplug the AC power
2. Remove ATX power cable from ATX power connector
3. Locate JP10 and short pins 2-3 for a few seconds
4. Return JP10 to its normal setting by shorting pins 1-2
5. Connect ATX power cable back to ATX power connector
Note: When should clear CMOS
1. Troubleshooting
2. Forget password
3. After over clocking system boot fail
CMOS RAM Clear Setting
2-3 closed Clear CMOS
JP10
1 3
JP10
1 3
1-2 closed Nor mal (Default)
8
2-3 Install CPU
2-3-1 Glossary
Chipset (or core logic) - two or more integrated circuits which control the interfaces
between the system processor, RAM, I/O devises, and adapter cards.
Processor slot/socket - the slot or socket used to mount the system processor on the
motherboard.
Slot (AGP, PCI, ISA, RAM) - the slots used to mount adapter cards and system RAM.
AGP - Accelerated Graphics Port - a high speed interface for video cards; runs at 1X
(66MHz), 2X (133MHz), or 4X (266MHz).
PCI - Peripheral Component Interconnect - a high speed interface for video cards,
sound cards, network interface cards, and modems; runs at 33MHz.
ISA - Industry Standard Architecture - a relatively low speed interface primarily used
for sound cards and modems; runs at approx. 8MHz.
Serial Port - a low speed interface typically used for mouse and external modems.
Parallel Port - a low speed interface typically used for printers.
PS/2 - a low speed interface used for mouse and keyboards.
USB - Universal Serial Bus - a medium speed interface typically used for mouse,
keyboards, scanners, scanners, and some digital cameras.
Sound (interface) - the interface between the sound card or integrated sound connectors
and speakers, MIC, game controllers, and MIDI sound devices.
LAN (interface) - Local Area Network - the interface to your local area network.
BIOS (Basic Input/Output System) - the program logic used to boot up a computer and
establish the relationship between the various components.
Driver - software, which defines the characteristics of a device for use by another
device or other software.
Processor - the "central processing unit" (CPU); the principal integrated circuit used for
doing the "computing" in "personal computer"
Front Side Bus Frequency - the working frequency of the motherboard, which is
generated by the clock generator for CPU, DRAM and PCI BUS.
CPU L2 Cache - the flash memory inside the CPU, normally Athlon CPU has 256K or
above, while Duron will have 64K.
9
2-3-2 About Intel Pentium 4 478-pin CPU
This motherboard provides a 478-pin surface mount, Zero Insertion Force (ZIF)
socket, referred to as the mPGA478B socket supports Intel Pentium 4 processor in
the 478 Pin package utilizes Flip-Chip Pin Grid Array (FC-PGA2) package
technology.
The CPU that comes with the motherboard should have a cooling FAN attached to
prevent overheating. If this is not the case, then purchase a correct cooling FAN
before you turn on your system.
WARNING! Be sure that there is sufficient air circulation across the processor’s
heatsink and CPU cooling FAN is working correctly, otherwise it may
cause the processor and motherboard overheat and damage, you may
install an auxiliary cooling FAN, if necessary.
To install a CPU, first turn off your system and remove its cover. Locate the ZIF
socket and open it by first pulling the level sideways away from the socket then
upward to a 90-degree angle. Insert the CPU with the correct orientation as shown
below. The notched corner should point toward the end of the level. Because the
CPU has a corner pin for two of the four corners, the CPU will only fit in the
orientation as shown.
CPU ZIF mPGAB Socket
Colden Arrow
mPGA478B
When you put the CPU into the ZIF socket. No force require to insert of the CPU,
then press the level to Locate position slightly without any extra force.
10
2-4 Install Memory
This motherboard provides three 168-pin DUAL INLINE MEMORY MODULES
(DIMM) sites for memory expansion available from minimum memory size of
64MB to maximum memory size of 3.0GB SDR SDRAM.
Valid Memory Configurations
Bank 168-Pin DIMM Total Memory
Bank 0, 1 (DIMM1) PC133 SDR SDRAM Module X1 64MB
∼
1.0GB
Bank 2, 3 (DIMM2) PC133 SDR SDRAM Module X1 64MB∼1.0GB
Bank 4, 5 (DIMM3) PC133 SDR SDRAM Module X1 64MB∼1.0GB
Total System Memory (Max. 3.0GB) 3 64MB∼3.0GB
NOTE!
Make sure the installed memory are PC133 SDRAM support 133MHz memory
clock, otherwise the system may hang during startup.
Generally, installing SDR SDRAM modules to your motherboard is very easy, you
can refer to figure 2-4 to see what a 168-Pin PC133 SDR SDRAM module looks
like.
DIMM2 (BANK2+BANK3)
DIMM1 (BANK0+BANK1)
DIMM3 (BANK4+BANK5)
NOTE!
When you install DIMM module fully into the DIMM socket the eject tab
should be locked into the DIMM module very firmly and fit into its
indention on both sides.
WARNING!
For the SDR SDRAM CLOCK is set at 133MHz, use only PC133compliant SDR Modules. When this motherboard operate at 133Mhz,
most system will not even boot if non-compliant modules are used because
of the strict timing issues, if your SDR Modules are not PC133-compliant,
set the SDR SDRAM clock to 100MHz to ensure system stability.
Figure 2-4
11
2-5 Expansion Cards
WARNING!
Turn off your power when adding or removing expansion cards or other
system components. Failure to do so may cause severe damage to both
your motherboard and expansion cards.
2-5-1 Procedure For Expansion Card Installation
1. Read the documentation for your expansion card and make any necessary
hardware or software setting for your expansion card such as jumpers.
2. Remove your computer’s cover and the bracket plate on the slot you intend to
use.
3. Align the card’s connectors and press firmly.
4. Secure the card on the slot with the screen you remove above.
5. Replace the computer system’s cover.
6. Set up the BIOS if necessary.
7. Install the necessary software driver for your expansion card.
2-5-2 Assigning IRQs For Expansion Card
Some expansion cards need an IRQ to operate. Generally, an IRQ must exclusively
assign to one use. In a standard design, there are 16 IRQs available but most of
them are already in use.
Standard Interrupt Assignments
IRQ Priority Standard function
0 N/A System Timer
1 N/A Keyboard Controller
2 N/A Programmable Interrupt
3 * 8 Communications Port (COM2)
4 * 9 Communications Port (COM1)
5 * 6 Sound Card (sometimes LPT2)
6 * 11 Floppy Disk Controller
7 * 7 Printer Port (LPT1)
8 N/A System CMOS/Real Time Clock
9 * 10 ACPI Mode when enabled
10 * 3 IRQ Holder for PCI Steering
11 * 2 IRQ Holder for PCI Steering
12 * 4 PS/2 Compatible Mouse Port
13 N/A Numeric Data Processor
14 * 5 Primary IDE Channel
15 * 1 Secondary IDE Channel
12
* These IRQs are usually available for ISA or PCI devices.
2-5-3 Interrupt Request Table For This Motherboard
Interrupt request are shared as shown the table below:
INT A INT B INT C INT D INT E INT F INT G INT H
Slot 1
√
Slot 2
√
Slot 3
√
Slot 4
√
Slot 5
√
Slot 6
√
Onboard VGA
Onboard USB 1
√
Onboard USB 2
√
AC97/MC97
√
IMPORTANT!
If using PCI cards on shared slots, make sure that the drivers support
“Sh ared IRQ” or that the cards don’t need IRQ assi gnme nts. Conf lict s
will arise between the two PCI groups that will make the system
unstable or cards inoperable.
2-5-4 AGP Slot
This motherboard provides an AGP Slot, only support the 1.5V 4X AGP VGA card.
Do not use AGP 2X card (3.3V) in this motherboard. It will burn and damage the
motherboard due to Intel® 845 chipset can not support AGP 2X (3.3V).
IMPORTANT! Before you plug-in AGP card, please make sure the following notice
is fully understood and practiced. If your AGP card has “AGP 4X
notch (show below) please make sure your AGP card is AGP 4X
(1.5V) not AGP 2X (3.3V)
AGP SLOT
2x notch 4x notch
13
Example 1: SiS 305 & ATi Rage 128 Pro AGP card those golden finger is compatible
with 2X/4X mode AGP slot, but only can support 2X (3.3V) only. If you
install these cards in Intel® 845 based motherboard it will burn and damage
the motherboard.
Example 2: We also find Diamond Vipper V770 golden finger is design for 2X/4X
mode AGP Slot. It can be adjusted the jumper for AGP 2X (3.3V) or
AGP 4X (1.5V). But the factory default setting is 2X (3.3V). If you
install this AGP card in motherboard without change the jumper setting to
4X (1.5V), it will burn the motherboard.
2-6 Connectors, Headers
2-6-1 Connectors
(1) Power Connector (20-pin block) : ATXPWR
ATX Power Supply connector. This is a new defined 20-pins connector that usually
comes with ATX case. The ATX Power Supply allows to use soft power on
momentary switch that connect from the front panel switch to 2-pins Power On
jumper pole on the motherboard. When the power switch on the back of the ATX
power supply turned on, the full power will not come into the system board until the
front panel switch is momentarily pressed. Press this switch again will turn off the
power to the system board.
PIN ROW2 ROW1
1 3.3V 3.3V
2 -12V 3.3V
3 GND GND
4 Soft Power On 5V
5 GND GND
6 GND 5V
7 GND GND
8 -5V Power OK
9 +5V +5V (for Soft Logic)
10 +5V +12V
Pin 1
(2) ATX 12V Power Connector (4-pin block) : ATX12V
This is a new defined 4-pins connector that usually comes with ATX Power Supply.
The ATX Power Supply which fully support Pentium 4 processor must including this
connector for support extra 12V voltage to maintain system power consumption.
Without this connector might cause system unstable because the power supply can not
provide sufficient current for system.
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