Gigabyte GA-A75M-D2H User Manual - Page 36

VGA Core Clock control - cpu support

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UMA Frame Buffer Size Frame buffer size is the total amount of system memory allocated solely for the onboard graphics controller. 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 configurable 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 configurable. 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 configurable 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 specifications. 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 configurable. (Default: Auto) Memory Clock This option is configurable 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. BIOS Setup - 36 -

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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 configurable 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 configurable.
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 configurable 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 specifications.
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 configurable. (Default: Auto)
Memory Clock
This option is configurable 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.