Intel DZ77GA-70K / DZ77RE-75K Desktop Board Performance Tuning Guide
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3.6.1.1 CPU Voltage Override Type
Two methods are provided for increasing the processor voltage, Processor Voltage
Override and Voltage Offset. Override commands the VR controller to supply a
constant voltage to the processor ignoring SVID requests from the processor. Offset
tells the VR controller to take the voltage requested by the processor and add extra
voltage to it. This way the processor can still control the voltage based on its loading
and power factors, resulting in a better thermal profile for over-clocking.
3.6.1.2 CPU Voltage Override
On the CPU Voltage Override, increase the voltage setting. This needs to be done to
provide the extra voltage to support performance tuning. The amount of voltage
increase needed depends on the amount of performance increase that is desired. This
is something of a trial and error process and the objective is to provide just enough
voltage so the processor can sustain the desired level of performance. Note that high
voltage settings may potentially cause processor damage. Later in the tuning process,
this voltage will be reduced to the lowest level that provides stability.
3.6.1.3 CPU VReg Droop Control
Set CPU VReg Droop Control to Low V-droop (Performance) if you are attempting to
maximize processor performance. If you are attempting moderate performance
increases, then the Mid or the High V-droop (Power Saving) selection is acceptable.
3.6.1.4 TDC Current Limit Override
Set the TDC Current Limit Override (Amps). The amount of additional processor
current needed depends on the amount of frequency increase being attempted and the
processor workload. The purpose of the TDC current limit is to thermally protect the
processor voltage regulator. If the processor voltage regulator gets too hot, it will
throttle (reduce the frequency of the processor) and greatly diminish performance.
3.6.1.5 Intel
®
Turbo Boost Technology
Ensure that Intel
®
Turbo Boost Technology is set to Enable.
3.6.1.6 Burst Mode Power Limit
Set Burst Mode to enable. Disabling burst mode will cause the processor to set the
burst mode to a specified default power limit of the installed processor. Burst mode is
the maximum instantaneous power that the processor is allowed to consume. It is
recommended that this limit be set higher than the sustained mode power limit.
3.6.1.7 Sustained Mode Time
Set Sustained Mode Time in seconds. One second is recommended as an initial
setting. Setting this time too long will exceed the capability of the processor heat sink
and may result in excess processor heating and subsequent throttling (frequency
reduction) to reduce the temperature. A longer time interval in sustained mode may
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