Gigabyte GA-G31M-S2L User Manual page 48

CPU Host Frequency (Mhz)
Allows you to manually set the CPU host frequency. This item is configurable only if the CPU
Host Clock Control option is enabled. The adjustable range is from 100 MHz to 700 MHz.
For an 800 MHz FSB CPU, set this item to 200 MHz.
For a 1066 MHz FSB CPU, set this item to 266 MHz.
For a 1333 MHz FSB CPU, set this item to 333 MHz.
Important It is highly recommended that the CPU frequency be set in accordance with the CPU
specifications.
PCI Express Frequency (Mhz)
Allows you to manually set the PCIe clock frequency. The adjustable range is from 90 MHz to
150 MHz. Auto sets the PCIe clock frequency to standard 100 MHz. (Default: Auto)
Performance Enhance
Allows the system to operate at three different performance levels.
Standard
Turbo
Extreme
System Memory Multiplier (SPD)
Allows you to set the system memory multiplier. Options are dependent on CPU FSB. Auto sets
memory multiplier according to memory SPD data. (Default: Auto)
Memory Frequency (Mhz)
The first memory frequency value is the normal operating frequency of the memory being used;
the second is the memory frequency that is automatically adjusted according to the CPU Host
Frequency (Mhz) and System Memory Multiplier settings.
High Speed DRAM DLL Settings
Provides two different memory timing configurations. If your system becomes unstable after you
overclock the DDR2 memory, select Option 1 or Option 2 to help make your system more stable.
Option 1
Option 2
System Voltage Control
Determines whether to manually set the system voltages. Auto lets BIOS automatically set the
system voltages as required. Manual allows all voltage control items below to be configurable.
(Default: Manual)
DDR2 OverVoltage Control
Allows you to to set memory voltage.
Normal
+0.1V ~ +0.4V Increases memory voltage by 0.1V to 0.4V at 0.1V increment.
Note: Increasing memory voltage may result in damage to the memory.
GA-G31M-S2L Motherboard
Lets the system operate at its basic performance level. (Default)
Lets the system operate at its good performance level.
Lets the system operate at its best performance level.
Memory Timing Configuration 1. (Default)
Memory Timing Configuration 2.
Supplies the memory voltage as required. (Default)
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