User guide
3-14 Chapter 3: BIOS setup
Chapter 3
3.5.5 Intel(R) SpeedStep(TM) Tech [Enabled]
When set to [Disabled], the CPU runs at its default speed. When set to [Enabled], the CPU
speed is controlled by the operating system. Conguration options: [Disabled] [Enabled]
3.5.6 Intel(R) TurboMode Tech [Enabled]
This item appears only if you set the CPU Ratio Setting item to [Auto]. Turbo mode allows
processor cores to run faster than marked frequency in specic condition.
Conguration options: [Disabled] [Enabled]
3.5.7 Xtreme Phase Full Power Mode [Auto]
[Auto] Automatic conguration.
[Enabled] Enables Full Power Mode to ensure the best CPU overclocking
performance.
The following two items appear only when you set the Ai Overclock Tuner item to
[Manual], [D.O.C.P.] or [X.M.P.].
BCLK Frequency [XXX]
Allows you to adjust the Internal Base Clock (BCLK). Use the <+> and <-> keys to adjust the
value. You can also type the desired value using the numeric keypad. The values range from
80 to 500.
PCIE Frequency [XXX]
Allows you to set the PCI Express frequency. Use the <+> and <-> keys to adjust the PCIE
frequency. The values range from 100 to 200.
3.5.8 DRAM Frequency [Auto]
Allows you to set the DDR3 operating frequency.
Conguration options: [Auto] [DDR3-800MHz] [DDR3-1066MHz] [DDR3-1333MHz] [DDR3-
1600*]
• The DRAM Frequency conguration options vary with the BCLK Frequency item
settings.
• According to Intel CPU spec, CPUs with a core frequency of 2.66G support the
maximum DIMM frequency of up to DDR3 1333. To use DIMMs of a higher frequency
with a 2.66G CPU, enable the DRAM O.C. Prole feature in BIOS. Refer to section
3.5.3 Ai Overclock Tuner for details.
Selecting a very high DRAM frequency may cause the system to become unstable! If this
happens, revert to the default setting.
3.5.9. DRAM Timing Control [Auto]
The items in this menu allow you to set the DRAM timing control features.
The conguration options for some of the following items vary depending on the DIMMsdepending on the DIMMs
you install on the motherboard.