User`s manual

BIOS Setup - 36 -
UMA Frame Buffer Size
Frame buffer size is the total amount of system memory allocated solely for the onboard graphics con-
troller. MS-DOS, for example, will use only this memory for display. Options are: Auto (default), 256MB,
512MB, 1024 MB.
Onboard Dual Link DVI
Enables or disables Dual Link DVI mode. Please note that the DisplayPort, D-Sub, and HDMI ports will
be disabled when Dual Link DVI mode is enabled. (Default: Disabled)
VGA Core Clock control
Allows you to determine whether to manually set the VGA Core clock. (Default: Auto)
VGA Core Clock(MHz)
Allows you to manually set the VGA Core clock. The adjustable range is from 300 MHz to 2000 MHz.
This item is congurable only if the VGA Core Clock control option is set to Manual.
CPU Clock Ratio
Allows you to alter the clock ratio for the installed CPU.
CPU NorthBridge Freq.
Allows you to alter the frequency of the CPU North Bridge controller.
Core Performance Boost
(Note)
Allows you to determine whether to enable the Core Performance Boost (CPB) technology, a CPU
performance-boost technology. (Default: Enabled)
CPB Ratio
(Note)
Allows you alter the ratio for the CPB. The adjustable range is dependent on the CPU being installed.
(Default: Auto)
CPU Host Clock Control
Enables or disables the control of CPU host clock. Auto (default) allows the BIOS to automatically adjust
the CPU host frequency. Manual allows the CPU Frequency (MHz) item below to be congurable.
Note: If your system fails to boot after overclocking, please wait for 20 seconds to allow for automated
system reboot, or clear the CMOS values to reset the board to default values.
CPU Frequency(MHz)
Allows you to manually set the CPU host frequency. This option is congurable only when CPU Host
Clock Control is set to Manual. Important It is highly recommended that the CPU frequency be set in
accordance with the CPU specications.
PCIe Spread Spectrum
Enables or disables PCIe Spread Spectrum. (Default: Disabled)
Set 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 congurable. (Default: Auto)
Memory Clock
This option is congurable only when Set Memory Clock is set to Manual.
X5.33 Sets Memory Clock to X5.33.
X6.66 Sets Memory Clock to X6.66.
X8.00 Sets Memory Clock to X8.00.
X9.33 Sets Memory Clock to X9.33.
(Note) This item is present only when you install a CPU that supports this feature.