User manual BERNEX GB21125 CATALOGUE 2010

[. . . ]  For product-related information, check on our website at: http://www. gigabyte. com Identifying Your Motherboard Revision The revision number on your motherboard looks like this: "REV: X. X. " For example, "REV: 1. 0" means the revision of the motherboard is 1. 0. Check your motherboard revision before updating motherboard BIOS, drivers, or when looking for technical information. Example: Table of Contents GB21125 Motherboard Layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 GB21125 Motherboard Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Chapter 1 Hardware Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1-1 1-2 1-3 1-4 1-5 1-6 1-7 Installation Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Use this menu to configure all the power-saving functions. „„ BIOS Features „„ Peripherals „„ Power Management „„ Save & Exit Save all the changes made in the BIOS Setup program to the CMOS and exit BIOS Setup. You can save the current BIOS settings to a profile or load optimized defaults for optimal-performance system operations. •• When the system is not stable as usual, select the Load Optimized Defaults item to set your system to its defaults. •• The BIOS Setup menus described in this chapter are for reference only and may differ by BIOS version. - 21 - 2-3 M. I. T. Whether the system will work stably with the overclock/overvoltage settings you made is dependent on your overall system configurations. Incorrectly doing overclock/overvoltage may result in damage to CPU, chipset, or memory and reduce the useful life of these components. This page is for advanced users only and we recommend you not to alter the default settings to prevent system instability or other unexpected results. (Inadequately altering the settings may result in system's failure to boot. If this occurs, clear the CMOS values and reset the board to default values. ) This section provides information on the BIOS version, CPU base clock, CPU frequency, memory frequency, total memory size , CPU temperature, Vcore, and memory voltages. - 22 - `` M. I. T. Current Status This screen provides information on CPU/memory frequencies/parameters. `` Advanced Frequency Settings && CPU Clock Ratio && CPU Frequency Allows you to alter the clock ratio for the installed CPU. Displays the current operating CPU frequency. `` Advanced CPU Core Features - 23 - && CPU Clock Ratio, CPU Frequency && Internal CPU PLL Overvoltage The settings under the two items above are synchronous to that under the same items on the Advanced Frequency Settings menu. - 25 - && Performance Enhance && DRAM Timing Selectable Allows the system to operate at three different performance levels. (Default) Extreme Lets the system operate at its best performance level. Quick and Expert allows the Channel Interleaving, Rank Interleaving, and memory timing settings below to be configurable. Displays the memory voltage as 1. 50V. && Profile DDR Voltage && Profile VTT Voltage && Channel Interleaving The value displayed here is dependent on the CPU being used. Enabled allows the system to simultaneously access different channels of the memory to increase memory performance and stability. Enabled allows the system to simultaneously access different ranks of the memory to increase memory performance and stability. (Default: Auto) && Rank Interleaving `` Channel A/B Timing Settings This sub-menu provides memory timing settings for each channel of memory. The respective timing setting screens are configurable only when DRAM Timing Selectable is set to Quick or Expert. Note: Your system may become unstable or fail to boot after you make changes on the memory timings. If this occurs, please reset the board to default values by loading optimized defaults or clearing the CMOS values. - 26 - `` Advanced Voltage Settings This sub-menu allows you to set CPU, memory voltage. `` PC Health Status - 27 - && Reset Case Open Status && Case Open Disabled Keeps or clears the record of previous chassis intrusion status. (Default) Enabled  Clears the record of previous chassis intrusion status and the Case Open field will show "No" at next boot. [. . . ] Always load the optimized defaults after updating the BIOS or after clearing the CMOS values. Press <Enter> on the device you select and select Yes to confirm. This function allows you to save the current BIOS settings to a profile. You can create up to 4 profiles and save as Setup Profile 1~ Setup Profile 4. [. . . ]