AOpen MX33 is a versatile computer motherboard with advanced features for enhanced performance and connectivity. It supports various processors, including Intel Celeron and Pentium III, and provides flexible memory options with three 168-pin DIMM sockets supporting up to 1.5GB of SDRAM, VCM SDRAM, or Registered SDRAM. The motherboard boasts integrated peripherals, including AC97 sound with an onboard AD1885 CODEC, allowing for high-quality audio output.
AOpen MX33 is a versatile computer motherboard with advanced features for enhanced performance and connectivity. It supports various processors, including Intel Celeron and Pentium III, and provides flexible memory options with three 168-pin DIMM sockets supporting up to 1.5GB of SDRAM, VCM SDRAM, or Registered SDRAM. The motherboard boasts integrated peripherals, including AC97 sound with an onboard AD1885 CODEC, allowing for high-quality audio output.
Battery-less
IrD
A
FDC
JP14 Clear CMOS
VIA 694X Chipset
133MHz FSB Clock
WOL (Wake on LAN)
Resettable Fuse
PC99 Back Panel
1500uF Low ESR capacitor
Jumpe
r
-less Design
Over-current Protection
Thermal Protection
CPU Fan Connecto
r
System Voltage & Fan Monitoring
A
TX Power Connecto
r
A
C Power Auto Recovery
JP23/29 FSB/PCI Clock Ratio
Housing Fan
WOM (Wake on Modem)
Front Panel Connecto
r
PC133 DIMM
Suspend to RAM
ATA/66/100 IDE Connecto
r
(ATA/100 for optional)
RAM Power LED
Support 2
nd
USB Ports x2
Wake on Time
r
Multi-Language BIOS
4X AGP
AMR
JP12 Onboard
AC97 Audio
CD Audio
Video_Audio_In
Modem Audio
PC99 Colored Back Panel
PS/2 Mouse
Connector
PS/2 Keyboard
Connector
USB Port
SPP/EPP/ECP
Parallel Port
COM 1 Port COM 2 Port
Game Port
MIC-In
Line-In
Speaker Out
ISA Slot x1 (Optional)
Hard Drive IDE Cable x 1
A
TA/66 IDE Cable x 1
Floppy Drive Cable x 1
Bonus Pack CD disc x 1
This Easy Installation Guide x 1
JP14 Clear CMOS
Normal Operation
(default)
Clear CMOS
This motherboard has AC97 sound onboard. JP12 is used to
enable or disable onboard AD1885 CODEC chip. If you select
Disable, you can use your preferred AMR sound card.
JP12 Enable/Disable Onboard Audio
Everything you need to boot this
motherboard is included in this Easy
Installation Guide. For more
information, a complete Online User's
Manual can be found in the Bonus
Pack CD Disc. Thanks for the help of
saving our earth.
Tip: When should I Clear CMOS?
1. Boot fail because of overclocking…
2. Forget password…
3. Troubleshooting…
You can clear CMOS to restore system default setting. To clear
the CMOS, follow the procedure below.
1. Turn off the system and unplug the AC power.
2. Remove ATX power cable from connector PWR2.
3. Locate JP14 and short pins 2-3 for a few seconds.
4. Return JP14 to its normal setting by shorting pins 1-2.
5. Connect ATX power cable back to connector PWR2.
PART NO.: 49.88902.002 DOC. NO.: AX34-EG-E0104C
Disable Enable
123
123
1
2
3
1
2
3
Installing CPU and Fan JP29/JP23 FSB/PCI Clock Ratio
Plug CPU to Socket 370 connector. Be careful of
CPU orientation. Plug in the fan cable to the 3-pin
CPUFAN or FAN connector.
GND
+12V
SENSOR
Setting CPU Frequency
The CPU frequency selection is set by going into:
BIOS Setup > Chipset Features Setup > CPU Voltage Setting
CPU Ratio 1.5x, 2x, 2.5x, 3x, 3.5x, 4x, 4.5x, 5x, 5.5x, 6x, 6.5x, 7x, 7.5x, and 8x
CPU FSB
66.8, 75, 83.3, 100, 103, 105, 110, 112, 115, 120, 124, 133, 140,
and 150 MHz.
Core Frequency = CPU FSB Clock * CPU Ratio
CPU CPU Core Frequency FSB Clock Ratio
CELERON 300A 300MHz 66MHz 4.5x
CELERON 533 533MHz 66MHz 8.0x
CELERON 600 600MHz 66MHz 9.0x
CELERON 667 667MHz 66MHz 10.0x
CELERON 700 700MHz 66MHz 10.5x
CELERON 733 733MHz 66MHz 11.0x
Pentium!!! 600E 600MHz 100MHZ 6.0x
Pentium!!! 700E 700MHz 100MHZ 7.0x
Pentium!!! 800E 800MHz 100MHZ 8.0x
Pentium!!! 850E 850MHz 100MHZ 8.5x
Pentium!!! 733EB 733MHz 133MHZ 5.5x
Pentium!!! 866EB 866MHz 133MHZ 6.5x
Pentium!!! 933EB 933MHz 133MHz 7x
Pentium!!! 1G 1000MHz 133MHz 7.5x
Pentium!!! 1.13G 1133MHz 133MHz 8.5x
Pentium!!! 1.2G 1200MHz 133MHz 9.0x
Note: Some CPU fans do not have
sensor pin, so that cannot support
fan monitoring.
Warning: VIA 694x chipset supports maximum 133MHz FSB and
66MHz AGP clock, higher clock setting may cause serious system
damage.
Home
This jumper is used to specify the relationship of PCI and
FSB clock. Generally speaking, we suggest you do not
change the default setting. But for overclocking, changing
these jumper settings becomes necessary. For example,
you must set JP29 to “5-6” and JP23 to “3-4” if you want to
overclock a 66MHz FSB clock CPU to 100MHz or higher.
Tip: If your system hangs or fails to boot
because of overclocking, simply use
<Home> key to restore the default setting
(233MHz).
Clock Ratio CPU (Host) PCI AGP Memory
2X 66 33 66 PCI x2 or x3
3X 100 33 66 PCI x2 or x3 or x4
3X, overclocking 112 37.3 74.6 PCI x2 or x3 or x4
4X 133 33 66 PCI x3 or x4
4X, overclocking 150 37.5 75 PCI x3 or x4
1 2
Auto
(
default
)
JP29 JP23
1 2
5 6
5 6
JP29 JP23
4X
(
133~150MHz
)
1 2
5 6
1 2
5 6
3X
(
100~124MHz
)
JP29 JP23
1 2
5 6
1 2
5 6
2X
(
66~83MHz
)
JP29 JP23
1 2
5 6
1 2
5 6
1
Tip: The driving capability of new generation
chipset is limited due to the lack of a memory
buffer (to improve performance). This makes
DRAM chip count an important factor to take
into consideration when you install DIMMs.
Unfortunately, there is no way that the BIOS
can identify the correct chip count, you need to
calculate the chip count by yourself. The
simple rule is: By visual inspection, use only
DIMMs which are less than 18 chips.
Connecting IDE and Floppy Cable
Connect 34-pin floppy cable and 40-pin IDE cable to floppy connector FDC and IDE
connector. The blue connector is IDE1 for clear identification. Be careful of the pin1
orientation. Wrong orientation may cause system damage.
A
ttach the power LED, speaker, and reset
switch connectors to the corresponding pins. I
f
you enable “Suspend Mode” item in BIOS
Setup, the ACPI & Power LED will keep
flashing while the system is in suspend mode.
Connecting Front Panel Cable
Locate the power switch cable from your AT
X
housing. It is 2-pin female connector from the
housing front panel. Plug this connector to the
soft-power switch connector marked SPWR.
Connecting CD/Modem/ Video_Audio_IN
Configuring System Memory
This motherboard has three 168pin DIMM sockets that
allow you to install system memory up to 1.5GB. SDRAM,
VCM SDRAM, Registered SDRAM are supported.
DIMM1
DIMM2
DIMM3
Pin 1
The Modem-CN connector is used to connect Mono
In/ Mic Out cable from internal modem card to
onboard sound circuit.
The black connector is used to connect CD Audio
cable from CDROM or DVD drive to onboard sound.
This green connector is used to connect MPEG
A
udio cable from MPEG card to onboard sound.
VIDEO_AUDIO_IN
Pin 1
Slave (4th)
Master (1st)Slave (2nd)
Master (3rd)
FDC
Pin 1
Pin 1
Speaker
IDE LED
+
+
+
SPWR
+
+
ACPI &
Power LED
Reset
1
SPWR
GND
ACPI & PWR LED
GND
+5V
NC
NC
GND
RESET
GND
NC
NC
+5
V
IDE LED
IDE LED
+5
V
+5
V
GND
NC
SPEAKE
R
IDE2
IDE1
Modem-CN
CD-IN
Connector Pin1 Pin2 Pin3 Pin4
Modem-CN
Mono In GND GND Mic Out
CD-IN
Left GND GND Right
Video_Audio_IN
Left GND GND Right
1. First, don’t install any add-on card except AGP card.
2. Install Windows 95 OSR2 v2.1, 1212 or 1214 version and later with USB
support. Otherwise, you need to install USBSUPP.EXE.
3. Install the VIA 4 in 1 driver, which includes VIA AGP Vxd driver, IRQ routing
driver, and VIA chipset function registry program.
4. Finally, Install other add-on cards and their drivers.
Installing Windows 95
Power-on and Load BIOS Setup
A
fter you finish the setting of jumpers and connect correct cables. Power
on and enter the BIOS Setup, press <Del> during POST (Power-On
Self Test). Choose "Load Setup Defaults" for recommended optimal
performance.
Del
Autorun Menu from Bonus CD Disc
You can use the autorun menu of Bonus CD disc. Choose the utility and driver and
select model name.
Warning: Please avoid of using
"Load Turbo Defaults", unless you
are sure your system components
(CPU, DRAM, HDD, etc.) are good
enough for turbo setting.
Installing Windows NT
Installing Windows 98
It is not necessary to install VIA 4 in 1 driver, just follow the installation guide of NT
and your add-on cards
1. First, don’t install any add-on card except AGP card.
2. Enable USB Controller in BIOS Setup > Integrated Peripherals > OnChip USB,
to make BIOS fully capable of controlling IRQ assignment.
3. Install Window 98 into your system.
4. Install the VIA 4 in 1 driver, which includes VIA AGP Vxd driver, IRQ routing
driver, and VIA chipset function registry program.
5. Finally, Install other add-on cards and their drivers.
You can install the VIA 4 in 1 driver (IDE Bus master, VIA AGP, IRQ Routing Driver,
VIA Registry) from the Bonus Pack CD disc autorun menu.
Installing VIA 4 in 1 Driver
Installing Onboard Sound Driver
This motherboard comes with an AD 1885 AC97 CODEC and the sound controller
is in VIA South Bridge chipset. You can find the audio driver from the Bonus Pack
CD disc autorun menu.
BIOS Upgrade
A
Open Easy Flash is user-friendlier than traditional flash method. The BIOS binary file
and flash routine are combined together and you simply run a single file to complete the
flash process.
1. Download new BIOS upgrade zipped file from AOpen's web site. For example,
AX34102.ZIP.
2. Run shareware PKUNZIP (http://www.pkware.com/
) which supports
miscellaneous operation systems to extract the binary BIOS file and the flash
utility. Or Winzip (http://www.winzip.com/) in Windows environment.
3. Save the unzipped file into a bootable floppy disk.
For example, AX34102.BIN & AX34102.EXE
4. Reboot the system to DOS mode without loading any memory handler (such as
EMM386) or device driver. It needs around 520K free memory space.
5. Execute A:> AX34102 and the program will do the rest of it.
DO NOT turn off the power during FLASH PROCESS until you are asked to!!
6. Reboot system and press <Del> to enter BIOS Setup, Choose "Load Setup
Defaults", then “Save & Exit Setup” and finish the BIOS upgrade.
Warning: The upgrade of new BIOS will permanently replace your original
BIOS content after flashing. The original BIOS setting and Win95/Win98
PnP information will be refreshed and you probably need to re-configure
your system.
If you encounter any trouble to boot you system, follow the
procedures accordingly to resolve the problem.
Part Number and Serial Number
The Part Number and Serial number are printed on bar code label. You can find this
bar code label on the outside packing, on ISA/CPU slot or on component side of PCB.
For example:
Model name and BIOS version
AX34 R1.00 Jan.04.2000 AOpen Inc.
A
ward Plug and Play BIOS Extension v1.0A
Copyright © 1998, Award Software, Inc.
Model name and BIOS version can be found on upper left corner of first boot screen
(POST screen). For example:
P/N: 91.88110.201 is part number, S/N: 91949378KN73 is serial number.
AX34 is model name of motherboard, R1.00 is BIOS version.
Make sure if the jumper settings for CPU and DRAMs are correct.
Clear CMOS.
Install the VGA card. Then connect your monitor and keyboard.
Turn on the power, and check if the power supply and
CPU fan work properly.
Start
The problem was probably caused by
power supply or motherboard failure.
Please contact your reseller or local
distributor for repairing.
Check if there is display.
Perhaps your VGA card or monitor is
defective.
No
Yes
No
Yes
Press Ctrl, and Alt key at the same time, hold them and then
press Del to see if the system reboots.
No
It is very possible that your keyboard is
defective.
During system rebooting, press Del to enter BIOS Setup. Choose
“Load Setup Default".
Turn off the system and re-connect the IDE cable.
Check if the system can reboot successfully.
The problem should be caused by the
IDE cables or HDD itself.
Re-install Windows 95, Windows 98 or Windows NT.
Yes
Yes
End
No
Turn off the power and unplug the AC power cable, then remove all of
the addon cards and cables, including VGA, IDE, FDD, COM1, COM
2
and Printer..
Part No. Serial No.
Part No.
Serial No.
Dear Customer,
Thanks for choosing AOpen products. To provide the best and fastest service to
our customer is our first priority. However, we receive numerous emails and
p
hone-calls worldwide everyday, it is very hard for us to serve everyone on time.
We recommend you follow the procedures below and seek help before contact us.
With your help, we can then continue to provide the best quality service to more
customers.
Thanks very much for your understanding!
A
Open Technical Supporting Team
Online Manual: Please check the manual carefully and make sure the
jumper settings and installation procedure are correct.
http://www.aopen.com.tw/tech/download/manual/default.htm
1
1
Test Report: We recommend to choose board/card/device from the
compatibility test reports for assembling your PC.
http://www.aopen.com.tw/tech/report/default.htm
2
2
FAQ: The latest FAQ (Frequently Asked Questions) may contain a
solution to your problem.
http://www.aopen.com.tw/tech/faq/default.htm
5
5
Download Software: Check out this table to get the latest updated
BIOS/utility and drivers.
http://www.aopen.com.tw/tech/download/default.htm
3
3
News Group: Your problem probably had been answered by our support
engineer or professional users on the news group.
http://www.aopen.com.tw/tech/newsgrp/default.htm
4
4
Contact Distributors/Resellers: We sell our products through
resellers and integrators. They should know your system
configuration very well and should be able to solve your problem
more efficiently than us. After all, their attitude of service is an
important reference for you if next time you want to buy something
else from them.
6
6
Contact Us: Please prepare detail system configuration and error symptom
before contacting us. The part number, serial number and BIOS version
are also very helpful.
7
7
Web Site: www.aopen.com
E-mail: Send us email by going through the contact form below.
English http://www.aopen.com/tech/contact/techusa.htm
Japanese http://www.aopen.co.jp/tech/contact/techjp.htm
Chinese http://www.aopen.com.tw/tech/contact/techtw.htm
German http://www.aopencom.de/tech/contact/techde.htm
French http://france.aopen.com.tw/tech/contact/techfr.htm
Simplified Chinese http://www.aopen.com.cn/tech/contact/techcn.htm
Pacific Rim
A
Open Inc.
Tel: 886-2-2696-1333
Fax: 886-2-8691-2233
A
merica
A
Open America Inc.
Tel: 1-510-498-8928
Fax: 1-408-922-2935, 1-408-432-0496
Europe
A
Open Computer b.v.
Tel: 31-73-645-9516
Fax: 31-73-645-9604
Germany
A
Open Computer GmbH.
Tel: 49-2102-157700
Fax: 49-2102-157799
China
尔鹏国际 ( )
Tel: 49-2102-157700
Fax: 49-2102-157799
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AOpen MX33 Easy Installation Manual
- Type
- Easy Installation Manual
- This manual is also suitable for
AOpen MX33 is a versatile computer motherboard with advanced features for enhanced performance and connectivity. It supports various processors, including Intel Celeron and Pentium III, and provides flexible memory options with three 168-pin DIMM sockets supporting up to 1.5GB of SDRAM, VCM SDRAM, or Registered SDRAM. The motherboard boasts integrated peripherals, including AC97 sound with an onboard AD1885 CODEC, allowing for high-quality audio output.
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