User manual GIGABYTE GA-A55M-DS2

[. . . ] 1001 12ME-A55MDS2-1001R Motherboard GA-A55M-DS2 Motherboard GA-A55M-DS2 Aug. 26, 2011 Copyright © 2011 GIGA-BYTE TECHNOLOGY CO. , LTD. The trademarks mentioned in this manual are legally registered to their respective owners. Disclaimer Information in this manual is protected by copyright laws and is the property of GIGABYTE. Changes to the specifications and features in this manual may be made by GIGABYTE without prior notice. [. . . ] Important It is highly recommended that the CPU frequency be set in accordance with the CPU specifications. Enables or disables PCIe Spread Spectrum. (Default: Disabled) CPU Host Clock Control CPU Host Clock PCIe Spread Spectrum Set Memory Clock Memory Clock Determines whether to manually set the memory clock. Auto lets BIOS automatically set the memory clock as required. Manual allows the memory clock control item below to be configurable. (Default: Auto) This option is configurable only when Set Memory Clock is set to Manual. X9. 33 Sets Memory Clock to X9. 33. (Note) This item is present only when you install a CPU that supports this feature. - 24 - DRAMConfiguration x x x x x x x x x x x x x CMOS Setup Utility-Copyright (C) 1984-2011 Award Software DRAMConfiguration [Auto] Auto Auto Auto Auto Auto Auto Auto Auto Auto Auto Auto Auto Auto [Enabled] SPD -9T 9T 9T 24T 5T 110ns -10T 5T 33T 4T -Auto -9T 9T 9T 24T 5T 110ns -6T 4T 20T 4T -Item Help Menu Level DDR3TimingItems 1T/2T Command Timing CAS# latency RAS to CAS R/W Delay Row Precharge Time Minimum RAS Active Time TwTr Command Delay Trfc0 for DIMM2 Trfc1 for DIMM1 Write Recovery Time Precharge Time Row Cycle Time RAS to RAS Delay Four Bank Activate Windows BankInterleaving Enter: Select : Move F5: Previous Values +/-/PU/PD: Value F6: Fail-Safe Defaults F10: Save ESC: Exit F1: General Help F7: Optimized Defaults DDR3 Timing Items 1T/2T Command Timing CAS# latency Manual allows all DDR3 Timing items below to be configurable. Options are: Auto (default), 90ns, 110ns, 160ns, 300ns, 350ns. Options are: Auto (default), 90ns, 110ns, 160ns, 300ns, 350ns. Options are: Auto (default), 5T~8T, 10T, 12T, 14T, 16T. - 25 - RAS to CAS R/W Delay Row Precharge Time Minimum RAS Active Time TwTr Command Delay Trfc0 for DIMM2 Trfc1 for DIMM2 Write Recovery Time Precharge Time Row Cycle Time RAS to RAS Delay FourBankActivateWindow Bank Interleaving Enables or disables memory bank interleaving. Enabled allows the system to simultaneously access different banks of the memory to increase memory performance and stability. (Default: Enabled) ********SystemVoltageOptimized******** System Voltage Control DDR3 Voltage Control Determines whether to manually set the system voltages. Auto lets the BIOS automatically set the system voltages as required. Manual allows all voltage control items below to be configurable. (Default: Auto) Allows you to set memory voltage. Normal Supplies the memory voltage as required. (Default) +0. 1V ~+0. 3V The adjustable range is from +0. 1V to +0. 3V. Note: Increasing memory voltage may result in damage to the memory or reduce the useful life of the memory. Normal Supplies the Chipset voltage as required. (Default) +0. 1V ~+0. 2V The adjustable range is from +0. 1V to +0. 2V. [. . . ] Follow the on-screen instructions to install the driver that suits your operating system. When completed, proceed with the Windows XP installation. B. Installing Windows 7/Vista Restart your system to boot from the Windows 7/Vista setup disk and perform standard OS installation steps. Insert the motherboard driver disk and then browse to the location of the driver. [. . . ]