User manual AOPEN AK77400G

[. . . ] AK77-400G / AK77-400GN Online Manual AK77-400G / AK77-400GN DOC. NO. : AK77400GN-OL-E0312C 1 AK77-400N / AK77-400GN What's in this manual TU Online Manual AK77-400G / AK77-400GNU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 T TU What's in this manualU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 T TU You Must NoticeU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Generally speaking, if you are not an over-clocker, we recommend you to set it to the default setting. Additionally, this motherboard also provides "1MHz Stepping Adjustment" feature for overclockers to adjust CPU FSB frequency via BIOS setup program. If you fix the CPU FSB frequency by JP21, the "1MHz Stepping Adjustment" range will be changed according to what type of CPU you use. JP 21 1-2 (default) 2-3 CPU FSB 133 MHz 166 MHz 200 MHz / Range 130-160 MHz 161-191 MHz 200-248 MHz 100-129 MHz Pin 1 JP21 K7 Host Clock 1 Select Jumper 1 100MHz 50 Auto detect (default) AK77-400N / AK77-400GN JP28 KB/Mouse Wake-up Jumper Online Manual This motherboard provides keyboard / mouse wake-up function. You can use JP28 to enable or disable this function, which could resume your system from suspend mode with keyboard or mouse installed. The factory default setting is set to "Disable" (1-2), and you may enable this function by setting the jumper to pin2-3. Pin 1 JP28 KB/Mouse Wake-up Jumper 1 1 Disable (Default) Enable 51 AK77-400N / AK77-400GN STBY LED Online Manual STBY LED is AOpen's considerate design that aims at providing you friendly system information. This is a convenient indication for you to check the system power status in many circumstances such as power on/off, stand-by mode and RAM power status during Suspend to RAM mode. System Power LED Warning: Do not install or remove the DIMM module or others devices when the STBY LED lights on. 52 AK77-400N / AK77-400GN AGP Protection Technology and AGP LED Online Manual With the outstanding R&D ability of AOpen and its specially developed circuit, this model implements a blend new technology to protect your motherboard from being damaged by over-voltage of AGP card. When AGP Protection Technology is implemented, this motherboard will automatically detect the voltage of AGP card and prevent your chipsets from being burnt out. Please note that if you install a AGP card with 3. 3V, which is not supported, the AGP LED on the motherboard will light up to warn you the possible damage of the exceeding voltage. You may contact your AGP card vendor for further support. AGP LED Warning: It is strongly recommended not to install a 3. 3V AGP card, which is not supported. When you do so, the AGP LED on the motherboard will light up to warn you the possible damage. 53 AK77-400N / AK77-400GN Bat te ry- less a nd Long Lif e Des ign H TU TH Online Manual This Motherboard implements Flash ROMU and a special circuit that allows you to save your current CPU and CMOS Setup configurations without using the battery. 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 Auto switching to ATX standby power RTC (Real Time Clock) 00:00:00 as long as AC power line is plugged. This smart design can increases battery life if you still had battery plugged on motherboard. Flash ROM CMOS Backup by EEPROM 54 AK77-400N / AK77-400GN 330 0 F L o w ES R Ca p a c it o r 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, this motherboard implements 3300F capacitor, which is much larger than normal capacitor (1000 or 1500F) and it provides better stability for CPU power. 55 AK77-400N / AK77-400GN Online Manual The power circuit of the CPU core voltage must be checked to ensure system stability for high speed CPUs (such as the Pentium IV, or when overclocking). A typical CPU core voltage is 2. 0V, so a good design should control voltage between 1. 860V and 2. 140V. Below is a timing diagram captured by a Digital Storage Scope, it shows the voltage transient is only 143mv even when maximum 60 current is applied. Note: This diagram for example only; it may not exactly be the same motherboard. 56 AK77-400N / AK77-400GN A O C o n f i g Ut i li ty AOpen Online Manual always dedicated to provide users a much friendlier computer environment. AOconfig is a Windows based utility with user-friendly interface that allows users to obtain information of the operation system and hardware such as 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 information in *. BMP or *. TXT format which users may collect the system information in detail and send them to AOpen directly for technical support or further diagnosis of system problem. 1. The system page shows the detail information of the motherboard, the operating system, the processor, and BIOS version. 2. The PCI device page shows the configurations of all PCI devices installed on your motherboard. 57 AK77-400N / AK77-400GN 3. [. . . ] In most case, newer versions of drivers and BIOS have solved earlier bugs or compatibility problems. http://download. aopen. com. tw/downloadsU HT U TH 91 AK77-400N / AK77-400GN Online Manual 5 6 7 eForum: AOpen eForum is provided to discuss our products with other users, in which your problem probably had been discussed before or will be answered. After log on, you may select your preferred language under "Multi-language". HU http://club. aopen. com. tw/forumU /U HU 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 efficiently and provide important reference for you. [. . . ]