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The power circuit of the CPU core voltage must be checked to ensure system stability for high speed CPUs (such as the new Pentium III, or 
when overclocking). A typical CPU core voltage is 2.0V, so a good design should control voltage between 1.860V and 2.140V. That is, the 
transient must be below 280mV. Below is a timing diagram captured by a Digital Storage Scope, it shows the voltage transient is only 
143mv even when maximum 60A current is applied. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note: This diagram for example only, it may not be exactly the same as the motherboard you purchased.

 

Summary of Contents for MX46 U2

Page 1: ...1 M MX X4 46 6 U U2 2 O On nl li in ne e M Ma an nu ua al l Overview Hardware Installation Drivers Utilities AWARD BIOS Setup Glossary Troubleshooting Technical Support MX46 U2 DOC NO MX46U2 OL E0208A...

Page 2: ...re Highlight 12 Quick Installation Procedure 16 Motherboard Map 17 Block Diagram 18 Hardware Installation 19 About User Upgrade Optional and Manufacture Upgrade Optional 20 JP14 Clear CMOS Data 21 CPU...

Page 3: ...36 IDE and Floppy Connector 37 ATA 133 Supported 39 IrDA Connector 40 AGP Accelerated Graphic Port Expansion Slot 41 Support 10 100 Mbps LAN onboard 42 CNR Communication and Network Riser Expansion S...

Page 4: ...Protection 54 Hardware Monitoring 55 Resettable Fuse 56 Low ESR Capacitor 57 Layout Frequency Isolation Wall 59 Enlarged Aluminum Heatsink 60 Vivid BIOS technology 61 Driver and Utility 62 Auto run Me...

Page 5: ...S Function Description 82 How To Use Award BIOS Setup Program 83 How To Enter BIOS Setup 85 BIOS Upgrade under Windows environment 86 Overclocking 88 VGA Card Hard Disk 89 Glossary 90 AC97 90 ACPI Adv...

Page 6: ...nd Decoding 93 DDR Double Data Rated SDRAM 93 DIMM Dual In Line Memory Module 93 DMA Direct Memory Access 94 ECC Error Checking and Correction 94 EDO Extended Data Output Memory 94 EEPROM Electronic E...

Page 7: ...C 2700 DDR DRAM 98 PCI Peripheral Component Interface Bus 98 PDF Format 98 PnP Plug and Play 98 POST Power On Self Test 99 RDRAM Rambus DRAM 99 RIMM Rambus Inline Memory Module 99 SDRAM Synchronous DR...

Page 8: ...6 U U2 2 O On nl li in ne e M Ma an nu ua al l USB2 0 Universal Serial Bus 101 VCM Virtual Channel Memory 102 ZIP file 102 Troubleshooting 103 Technical Support 107 Product Registration 110 How to Co...

Page 9: ...is manual are used for identification purposes only and may be the registered trademarks of their respective owners All of the specifications and information contained in this manual are subject to ch...

Page 10: ...configuration changes This Online Manual is saved in PDF format we recommend using Adobe Acrobat Reader 4 0 for online viewing it is included in Bonus CD or you can get free download from Adobe web si...

Page 11: ...s AGP 4X mode and pipelined spilt transaction long burst transfer up to 1056MB sec According to different customer s requirements this motherboard supports DDR200 SDRAM DDR 266 SDRAM up to 2GB maximum...

Page 12: ...AC97 Interface three Universal Serial Bus 1 1 Host Controllers and the IDE Master Slave controllers The PCI to LPC bridge I O Advanced Programmable Interrupt Controller legacy system I O and legacy p...

Page 13: ...justment function in the BIOS This magic function allows you to adjust CPU FSB frequency from 100 248MHz by 1MHz stepping adjustment and helps your system get maximum performance LAN Port On the stren...

Page 14: ...newest audio transfer file format which provides impressive quality through optical fiber and allows you to enjoy digital audio instead of analog audio Power Management Plug and Play Supports the pow...

Page 15: ...s 98 ME 2000 series compatibility and supports Soft Off STR Suspend to RAM S3 STD Suspend to Disk S4 features Super Multi I O Provides two high speed UART compatible serial ports and one parallel port...

Page 16: ...to install your system Follow each step accordingly 1 Installing CPU and Fan 2 Installing System Memory DIMM 3 Connecting Front Panel Cable 4 Connecting IDE and Floppy Cable 5 Connecting ATX Power Cab...

Page 17: ...ector 184 pin DIMMx2 supports DDR200 266 SDRAM maximum up to 2GB ATX Power Connector SIS 650GX 962L Chipset 478 pin CPU socket Willamette Northwood with Voltage and Frequency Auto detection that suppo...

Page 18: ...P 4X Slot SIS 962L Serial Port x2 USB Port USB Port x6 32 bit PCI Slot x3 Parallel Port IDE Drive x4 ATA 66 100 133 DDR 200 266 SDRAM Up to 2GB Primary Channel Secondary Channel 2Mbit Flash EEPROM PCI...

Page 19: ...rocessor disk drives expansion boards and other components Always observe the following precautions before you install a system component 1 Do not remove a component from its protective packaging unti...

Page 20: ...all of AOpen s motherboards have included many amazing and powerful features sometimes not every user is familiar with these powerful features As a result of this we define features that can be upgra...

Page 21: ...dure 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...

Page 22: ...l of CPU orientation when you plug it into CPU socket Note Those pictures are for example only they may not look the same with the motherboard you purchased 2 Locate Pin 1 in the socket and look for m...

Page 23: ...d you purchased Note If you do not match the CPU socket Pin 1 and CPU cut edge well you may damage the CPU 3 Press down the CPU socket lever and finish CPU installation CPU cut edge Note This socket s...

Page 24: ...shipped we strongly recommend you to install AOpen special designed CPU Fan as shown below on the retention module for better heat dissipation Please install the CPU Fan correctly as the following pic...

Page 25: ...on and allows the user to set the CPU frequency through the BIOS setup therefore no jumpers or switches are used The disadvantages of the Pentium based jumper less designs are eliminated There will be...

Page 26: ...according to user s settings stored in the BIOS If system failed in BIOS POST the Watch Dog Timer will reset the system to reboot in five seconds Then BIOS will detect the CPU s default frequency and...

Page 27: ...erates proper CPU core voltage S Se et tt ti in ng g C CP PU U F Fr re eq qu ue en nc cy y BIOS Setup Frequency Voltage Control CPU Clock Setting This motherboard is CPU jumper less design you can set...

Page 28: ...clock setting may cause serious system damage Willamette CPU CPU Core Frequency FSB Clock System Bus Ratio Pentium 4 1 5G 1500MHz 100MHz 400MHz 15x Pentium 4 1 6G 1600MHz 100MHz 400MHz 16x Pentium 4...

Page 29: ...th h H H W W M Mo on ni it to or ri in ng g Plug in the CPU fan cable to the 3 pin CPUFAN1 connector If you have chassis fan you can also plug it on SYSFAN2 or SYSFAN3 connector Note Some CPU fans do...

Page 30: ...l ls s 1 1s st t U US SB B P PS S2 2 c ch ha an nn ne el l a an nd d J JP P2 27 7 c co on nt tr ro ol ls s 2 2n nd d U US SB B c ch ha an nn ne el l T Th he e f fa ac ct to or ry y d de ef fa au ul lt...

Page 31: ...2 2 O On nl li in ne e M Ma an nu ua al l D DI IM MM M S So oc ck ke et ts s This motherboard has two 184 pin DDR DIMM sockets that allow you to install PC2100 DDR266 memory or PC1600 DDR200 memory up...

Page 32: ...re the DIMM module s pin face down and match the socket s size as depicted below 2 Insert the module straight down to the DIMM slot with both hands and press down firmly until the DIMM module is secur...

Page 33: ...going along a two lane highway while at the same time data in traditional SDRAM go along a one way street Therefore it is a more advanced technology that provides a great overall improvement in system...

Page 34: ...eset switch connectors to the corresponding pins If you enable Suspend Mode item in BIOS Setup the ACPI Power LED will keep flashing while the system is in suspend mode Locate the power switch cable f...

Page 35: ...onnector and use standard power supply specially designed for Pentium 4 system A AC C P Po ow we er r A Au ut to o R Re ec co ov ve er ry y A traditional ATX system should remain at power off stage wh...

Page 36: ...nformation The STBY LED will light up when power is provided to the motherboard This is a convenient indication for you to check the system power status in many circumstances such as power on off stan...

Page 37: ...aster 1st Pin 1 I ID DE E a an nd d F Fl lo op pp py y C Co on nn ne ec ct to or r Connect 34 pin floppy cable and 40 pin IDE cable to floppy connector FDD and IDE connector Be careful of the pin1 ori...

Page 38: ...as master or slave mode depends on the jumper on your IDE device so please refer to your hard disk and CDROM manual accordingly Warning The specification of the IDE cable is a maximum of 46cm 18 inche...

Page 39: ...tems such as Window XP that demand more storage space and faster data transfer rates from more responsive computing experiences To make good use of this new technology and enjoy its best performance w...

Page 40: ...uch as Laplink or Windows 95 Direct Cable Connection the user can transfer files to or from laptops notebooks PDA devices and printers This connector supports HPSIR 115 2Kbps 2 meters and ASK IR 56Kbp...

Page 41: ...t MX46 U2 provides an AGP 4x slot The AGP 4x is a bus interface targeted for high performance 3D graphic AGP supports only memory read write operation and single master single slave one to one only AG...

Page 42: ...AN Connect device it provides 10 100M bps Ethernet for office and home use the Ethernet RJ45 connector is located on top of USB connectors The green LED indicates the link mode it lights when linking...

Page 43: ...ro on ng ge er r t th he e d di ig gi it ta al l p pr ro oc ce es ss si in ng g j jo ob b c ca an n b be e i im mp pl le em me en nt te ed d i in n m ma ai in n c ch hi ip ps se et t a an nd d s sh ha...

Page 44: ...ouse which is using a PS 2 plug USB Port Available for connecting USB devices Parallel Port To connect with SPP ECP EPP printer COM1 COM2 Port To connect with pointing devices modem or others serial d...

Page 45: ...SB devices from PC99 back panel or connect USB2 header to the front panel of chassis Compared to traditional USB 1 0 1 1 with the speed of 12Mbps USB 2 0 has a fancy speed up to 480Mbps which is 40 ti...

Page 46: ...ks you have to enable it in the system BIOS connect this header to a sensor somewhere on the chassis So whenever the sensor is triggered by lights or by the opening of the chassis the system will beep...

Page 47: ...nl li in ne e M Ma an nu ua al l C CD D A Au ud di io o C Co on nn ne ec ct to or r This connector is used to connect CD Audio cable from CDROM or DVD drive to onboard sound L GND GND R C CD D I IN N...

Page 48: ...d comes with a game port Joystick Midi for you to connect any midi devices or joysticks To use this function you have to have a joystick module and connect it with a game port cable to this port on th...

Page 49: ...or rt ts s O On ne e o of f t th he em m i is s o on n t th he e b ba ac ck k p pa an ne el l a an nd d t th he e o ot th he er r o on ne e i is s o on n t th he e m mi id dd dl le e l le ef ft t o o...

Page 50: ...e remove the jumper cap from the Front Audio Connector before you connect the cable Do not remove this yellow jumper cap if your housing doesn t have an audio port on the front panel Note Please remov...

Page 51: ...ly there are two S PDIF outputs as shown one for RCA connector the most common one used for consumer audio products and the other for optical connector with a even better audio quality Through a speci...

Page 52: ...l m mo od du ul le e T To o a ap pp pl ly y t th hi is s f fu un nc ct ti io on n y yo ou u h ha av ve e t to o i in ns st ta al ll l t th he e a au ud di io o d dr ri iv ve er r i in n t th he e B Bo...

Page 53: ...configurations The RTC real time clock can also keep running as long as the power cord is plugged If you lose your CMOS data by accident you can just reload the CMOS configurations from Flash ROM and...

Page 54: ...urrent protection in conjunction with 3 3V 5V 12V power supply provide the full line over current protection ATX Switching Power Supply 3 3V Protected by power supply 5V Protected by power supply Onbo...

Page 55: ...system this smart design will monitor your system s working voltage fan status and CPU temperature If any of those systems status goes wrong there will be an alarm through the chassis external speake...

Page 56: ...yboard and USB port from over current or shortage These fuses are soldered onboard that when it is broken function to protect motherboard user cannot replace them and result in malfunction of motherbo...

Page 57: ...ries Resistance during high frequency operation is very important for the stability of CPU power The idea of where to put these capacitors is another know how that requires experience and detail calcu...

Page 58: ...overclocking A typical CPU core voltage is 2 0V so a good design should control voltage between 1 860V and 2 140V That is the transient must be below 280mV Below is a timing diagram captured by a Digi...

Page 59: ...alled Frequency Isolation Wall Separating each critical portion of motherboard into regions where each region operates in a same or similar frequency range we can avoid cross talk and frequency interf...

Page 60: ...al l E En nl la ar rg ge ed d A Al lu um mi in nu um m H He ea at ts si in nk k Cool down CPU and Chipset are important for system reliability Enlarged aluminum heat sink provides better heat consumpt...

Page 61: ...n VividBios now brings you a beautiful and sleek 256 colors screen without missing any important information shown on POST screen In addition the limited space of BIOS ROM is another big issue When al...

Page 62: ...Bonus CD You don t need to install all of them to boot your system But after you finish the hardware installation you have to install your operation system first such as Windows 98 before you install...

Page 63: ...6 U U2 2 O On nl li in ne e M Ma an nu ua al l A Au ut to o r ru un n M Me en nu u f fr ro om m B Bo on nu us s C CD D You can use the auto run menu of Bonus CD Choose the utility and driver and sele...

Page 64: ...64 M MX X4 46 6 U U2 2 O On nl li in ne e M Ma an nu ua al l I In ns st ta al ll li in ng g I ID DE E D Dr ri iv ve er r To use IDE devices you have to install IDE driver from Bonus Pack CD...

Page 65: ...e M Ma an nu ua al l I In ns st ta al ll li in ng g A AG GP P D Dr ri iv ve er r Y Yo ou u c ca an n f fi in nd d A AG GP P d dr ri iv ve er r f fr ro om m t th he e B Bo on nu us s P Pa ac ck k C CD...

Page 66: ...in ng g V VG GA A D Dr ri iv ve er r S Si iS S 6 65 50 0G GX X s su up pp po or rt ts s V VG GA A o on n t th hi is s m mo ot th he er rb bo oa ar rd d Y Yo ou u c ca an n i in ns st ta al ll l V VG...

Page 67: ...67 M MX X4 46 6 U U2 2 O On nl li in ne e M Ma an nu ua al l I In ns st ta al ll li in ng g U US SB B2 2 0 0 D Dr ri iv ve er r In Bonus Pack CD you can install USB2 0 driver from the following screen...

Page 68: ...68 M MX X4 46 6 U U2 2 O On nl li in ne e M Ma an nu ua al l I In ns st ta al ll li in ng g A Au ud di io o D Dr ri iv ve er r In Bonus Pack CD you can install audio driver from the following screen...

Page 69: ...ufacturer 2 Specify the setup file pathname CD ROM Driver LAN RTL8100 Windows Win95 WIN95A for Windows 95 and Win95A or CD ROM Driver LAN RTL8100 Windows Win95 for Windows 95 OSR2 3 Windows 95 will ap...

Page 70: ...dows NT When you are in Windows NT 1 In the Main group of NT select the Control Panel icon 2 In the Control Panel window choose the Network icon 3 In the Network Settings dialog box choose the Add Ada...

Page 71: ...en Your machine contains more than one hardware bus please select the Bus Type and Bus number on which your network adapter card is installed 9 NT will then perform the binding process If any addition...

Page 72: ...s motherboard CPU memory PCI devices and IDE devices The powerful utility also displays the version of BIOS and firmware for your convenience of maintenance Moreover AOConfig allows users to save info...

Page 73: ...can only be operated in a system equipped with an AOpen motherboard Before running AOConfig all applications must be closed 4 From this page users can obtain the technical support information of AOpe...

Page 74: ...a ar rd dw wa ar re e M Mo on ni it to or ri in ng g U Ut ti il li it ty y You can install Hardware Monitoring Utility to monitor CPU temperature fans and system voltage The hardware monitoring functi...

Page 75: ...o hard disk and then the system can be totally power off Next time when power is on you can resume your original work directly from hard disk within few seconds without go through the Windows booting...

Page 76: ...hown Select Hibernate and Apply 3 Clean boot into DOS and run AOZVHDD utility a If you assign the whole disk to your Win 98 system FAT 16 or FAT 32 please run aozvhdd c file Please remember sufficient...

Page 77: ...ETECT b Select ADD Binary and name it as ACPIOPTION c Right click and select Modify add 01 after 0000 to make it 0000 01 d Save changes 2 Select Add New Hardware under Control Panel Allow Windows 98 t...

Page 78: ...hange 01 to 02 to make it 0000 02 c Save changes 2 Select Add New Hardware under Control Panel Allow Windows 98 to detect new hardware It will find Plug and Play BIOS and remove ACPI BIOS 3 Reboot sys...

Page 79: ...gh the Windows 98 booting process and run your application again Suspend to DRAM saves your current work in the system memory it is faster than Suspend to Hard Drive but requires power supplied to DRA...

Page 80: ...d Currently except Windows 95 and Windows NT all other Windows Systems support ACPI Procedures 1 Changed the following BIOS settings BIOS Setup Power Management Setup ACPI Function Enabled BIOS Setup...

Page 81: ...el support for standard devices such as hard disk drives serial and parallel ports Most BIOS settings of MX46 U2 have been optimized by AOpen s R D engineering team But the default setting of BIOS sti...

Page 82: ...ve user a more friendly computer system Now we include all function descriptions of BIOS setup program into the BIOS Flash ROM When you select one function of BIOS setup program the function descripti...

Page 83: ...OS setup program By the way all products of AOpen also provide a special function in BIOS setup you can press F3 key selecting you preferred menu language Key Description Page Up or Changing setting t...

Page 84: ...M MX X4 46 6 U U2 2 O On nl li in ne e M Ma an nu ua al l Key Description F6 Load fail save setting value from CMOS F7 Load turbo setting value from CMOS F10 Save changed setting and exit setup progr...

Page 85: ...finish jumper settings and connect correct cables power on and enter the BIOS Setup Press Del during POST Power On Self Test and choose Load Setup Defaults for recommended optimal performance Warning...

Page 86: ...ew BIOS Flash wizard EzWinFlash With an eye to users convenience EzWinFlash combines the BIOS binary code and flash module together so the only thing you have to do is just clicking on the utility you...

Page 87: ...he model name and BIOS version of your motherboard If you had got the wrong BIOS you will not be allowed to proceed with the flash steps 5 You may select preferred language in the main menu then click...

Page 88: ...bus clock But it comes with clock generator of 248MHz when we design it to accommodate with future CPU bus clock Not only that the CPU clock ratio can be up to 24x that supports almost all of Pentium...

Page 89: ...our reference the following list are what have been successful overclocked in our lab Please note that AOpen can not guaranty they can be successful overclocked again Please check the Available Vendor...

Page 90: ...to operating system and bypass BIOS The chipset or super I O chip needs to provide standard register interface to operating system such as Windows 98 This is a bit similar as the PnP register interfac...

Page 91: ...d P Po ow we er r M Ma an na ag ge em me en nt t Unlike ACPI BIOS controls most APM power management functions AOpen Suspend to Hard Drive is a good example of APM power management A AT TA A A AT T A...

Page 92: ...a as si ic c I In np pu ut t O Ou ut tp pu ut t S Sy ys st te em m BIOS is a set of assembly routine program that reside in EPROM or Flash ROM BIOS controls Input output devices and other hardware dev...

Page 93: ...R D Do ou ub bl le e D Da at ta a R Ra at te ed d S SD DR RA AM M DDR SDRAM utilizes the existing DRAM infrastructure and technology while doubling the nominal bandwidth available to systems in an ea...

Page 94: ...is actually very similar to FPM Fast Page Mode Unlike traditional FPM that tri states the memory output data to start the pre charge activity EDO DRAM holds the memory data valid until the next memor...

Page 95: ...ut a shielding of housing F FC C P PG GA A F Fl li ip p C Ch hi ip p P Pi in n G Gr ri id d A Ar rr ra ay y FC means Flip Chip FC PGA is a new package of Intel for Pentium III CPU It can plug into SKT...

Page 96: ...n control of the serial bus in the form of optimizing arbitration timing guarantee of adequate electrical power for all devices on the bus assignment of isochronous channel ID and notification of erro...

Page 97: ...R RA AM M P Pi ip pe el li in ne ed d B Bu ur rs st t S SR RA AM M For Socket 7 CPU one burst data read requires four QWord Quad word 4x16 64 bits PBSRAM only needs one address decoding time and autom...

Page 98: ...r the internal connection of peripheral devices high speed data channel between the computer and expansion card P PD DF F F Fo or rm ma at t A file format for electronic document PDF format is indepen...

Page 99: ...ny RIMM sockets R RI IM MM M R Ra am mb bu us s I In nl li in ne e M Me em mo or ry y M Mo od du ul le e 184 pin memory module that supports RDRAM memory technology A RIMM memory module may contain up...

Page 100: ...a an na ag ge em me en nt t B Bu us s SMBus is also called I2C bus It is a two wire bus developed for component communication especially for semiconductor IC For example set clock of clock generator f...

Page 101: ...arge amounts of access to data on the hard disk drive Ultra DMA uses Cyclical Redundancy Checking CRC offering a new level of data protection Ultra DMA uses the same 40 pin IDE interface cable as PIO...

Page 102: ...ia requirements VCM increases memory bus efficiency and performance of any DRAM technology by providing a set of fast static registers between the memory core and I O pins Using VCM technology results...

Page 103: ...then remove all of the add on cards and cables including VGA IDE FDD COM1 COM2 and printer T Tr ro ou ub bl le es sh ho oo ot ti in ng g If you encounter any trouble to boot you system follow the pro...

Page 104: ...GA card Then connect your monitor and keyboard Continue Turn on the power and check if the power supply and CPU fan work properly The problem is probably caused by power supply or motherboard failure...

Page 105: ...inue Press Ctrl and Alt key at the same time hold them and then press Del to reboot the system Check if there is display No Yes Perhaps your VGA card or monitor is defective Check if the system reboot...

Page 106: ...tem rebooting press Del to enter BIOS setup Choose Load Setup Default Check if the system can reboot successfully No The problem should be caused by the IDE cable or HDD itself End Yes Turn off the sy...

Page 107: ...uch for your understanding AOpen Technical Supporting Team Online Manual Please check the manual carefully and make sure the jumper settings and installation procedure are correct http english aopen c...

Page 108: ...support engineer or professional users on the news group http english aopen com tw tech newsgrp default htm Contact Distributors Resellers We sell our products through resellers and integrators They...

Page 109: ...IO OS S v ve er rs si io on n Model name and BIOS version can be found on upper left corner of first boot screen POST screen For example MX46 U2 is model name of motherboard R1 20 is BIOS version MX46...

Page 110: ...issues Receive email notification about latest product s announcements Be able to personalize your AOpen web pages Receive e mail notification about latest BIOS Driver Software release information Hav...

Page 111: ...uter b v Tel 31 73 645 9516 Fax 31 73 645 9604 Germany AOpen Computer GmbH Tel 49 1805 559191 Fax 49 2102 157799 China Tel 86 21 6225 8622 Fax 86 21 6225 7926 Japan AOpen Japan Inc Tel 81 048 290 1800...

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