User manual AOPEN MX4GV

[. . . ] Overview Troubleshooting & Technical Support Hardware Installation Drivers & Utilities AWARD BIOS Setup Glossary Online Manual DOC. NO. : MX4GV-OL-E0208A MX4GV MX4GV 1 MX4GV What's in this manual Online Manual MX4GV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 What's in this manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 You Must Notice. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Before You Start. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Normally 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 specific audio cable, you can connect the S/PDIF connector to a S/PDIF audio module bearing S/PDIF digital output. However, you must have a S/PDIF supported speaker with S/PDIF digital input to make the most of this function. 1 5 +5V NC SPDIFOUT GND SPDIFIN Pin 1 S/PDIF Connector Connecting to RCA Cable Connecting to Optical Cable Audio cable S/PDIF Module (User Upgrade Optional) 53 MX4GV Battery-less and Long Life Design Online Manual This Motherboard implements a Flash ROM and a special circuit that provide you no batter power consumption of current CPU and CMOS Setup 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 the system will recover as usual. ATX Stand-by Power Battery Auto Switch RTC (Real Time Clock) 00:00:00 Auto switching to ATX standby power as long as AC power line is plugged. This smart design increases battery life if you still plug battery on motherboard. Flash ROM CMOS Backup by EEPROM 54 MX4GV Over-current Protection Online Manual The Over Current Protection is a popular implementation on ATX 3. 3V/5V/12V switching power supply. However, the new generation CPU uses different voltage with a regulator to transfer 12V to CPU voltage (for example, 2. 0V), and thus makes 5V over current protection useless. This motherboard is with switching regulator onboard supporting CPU over-current protection; in conjunction with 3. 3V/5V/12V power supply provide the full line over-current protection. 3. 3V (Protected by power supply) ATX Switching Power Supply 5V (Protected by power supply) 12V (Protected by power supply) Onboard Power Regulator Over-Current Protection Circuit CPU Core Voltage Note: Although we have implemented protection circuit and tried to prevent any human operating mistake, certain risks might still happen when CPU, memory, HDD or add-on cards installed on this motherboard is damaged due to component failure, human operating error or other unknown natural reasons. AOpen cannot guarantee that the protection circuit will always work perfectly. 55 MX4GV Hardware Monitoring Online Manual This motherboard implements a hardware monitoring system. As you turn on your 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 speaker or buzzer of motherboard (if having this function and enabled) to warn the user. Fan Fan Speed CPU CPU Temperature CPU Voltage Detection Circuit AOpen H/W Monitoring Utility Power System Voltage 56 MX4GV Resetable Fuse Online Manual Traditional motherboard uses fuses to prevent Keyboard 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 motherboard. With expensive Resetable Fuse, the motherboard can be resumed back to normal function even after the fuse had done its protection job. Resetable Fuse 57 MX4GV Low ESR Capacitor Online Manual The quality of low ESR capacitor (Low Equivalent Series 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 calculation. Not only that, MX4GV implements 2200F capacitors, which is much larger than normal capacitor (1000 & 1500F) and it provides better stability for CPU power. 58 MX4GV Online Manual 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. 59 MX4GV Layout (Frequency Isolation Wall) Online Manual For high frequency operation, especially when overclocking, layout is the most important factor to make sure both chipset and CPU are working in stable condition. The layout of this motherboard implements AOpen's unique design called "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 interference between each region's operations and condition. The trace length and route must be calculated carefully. [. . . ] You can find this bar code label on the outside packing, on ISA/CPU slot or on component side of PCB. For example: Part No. Serial No. Part No. P/N: 91. 88110. 201 is part number, S/N: 91949378KN73 is serial number. 103 MX4GV Model name and BIOS version Online Manual Model name and BIOS version can be found on upper left corner of first boot screen (POST screen). For example: MX4GV R1. 20 Aug. 01. 2002 AOpen Inc. Award Plug and Play BIOS Extension v1. 0A Copyright © 2002, Award Software, Inc. MX4GV is model name of motherboard; R1. 20 is BIOS version. 104 MX4GV Online Manual Product Registration Thank you for choosing AOpen product. [. . . ]