Gigabyte GA-A75-UD4H User Manual page 39

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.
DRAM Configuration
CMOS Setup Utility-Copyright (C) 1984-2011 Award Software
DDR3 Timing Items
x 1T/2T Command Timing
x CAS# latency
x RAS to CAS R/W Delay
x Row Precharge Time
x Minimum RAS Active Time
x TwTr Command Delay
x Trfc0 for DIMM2, DIMM4
x Trfc1 for DIMM1, DIMM3
x Write Recovery Time
x Precharge Time
x Row Cycle Time
x RAS to RAS Delay
x Four Bank Activate Windows
Bank Interleaving
higf: Move Enter: Select
F5: Previous Values
DDR3 Timing Items
Manual allows all DDR3 Timing items below to be configurable.
Options are: Auto (default), Manual.
1T/2T Command Timing
Options are: Auto (default), 1T, 2T.
DRAM Configuration
[Auto] SPD Auto
Auto -- --
Auto 9T 9T
Auto 9T 9T
Auto 9T 9T
Auto 24T 24T
Auto 5T 5T
Auto 110ns 110ns
Auto -- --
Auto 10T 6T
Auto 5T 4T
Auto 33T 20T
Auto 4T 4T
Auto -- --
[Enabled]
+/-/PU/PD: Value F10: Save
F6: Fail-Safe Defaults
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Item Help
Menu Level 
ESC: Exit F1: General Help
F7: Optimized Defaults
BIOS Setup