Processor Tuning Process: The Host Clock Method; Increasing The Host Clock Frequency - Intel DP55KG Performance Tuning Manual

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Intel Desktop Board DP55KG and Intel Desktop Board DP55SB Extreme Series
Performance Tuning Guide
4.2. Processor Tuning Process: The Host Clock
Method
The frequency of the CPU can be set by increasing the host clock and leaving the multipliers
unchanged.
From the Performance page set the "Host Clock Frequency Override" setting to "Manual".
Next, increase the Host Clock Frequency (MHz) to a desired level.
Figure 8. Increasing the Host Clock Frequency
In Figure 8, the column labeled "Proposed" shows the results of setting the host clock to
148 MHz which will result in a processor speed of 4.00 GHz with Turbo mode set to default
27 multiplier with Turbo Boost enabled. Additional voltage may need to be applied to the
processor to ensure stable performance at 4.00 GHz.
Note: The multipliers for the processor were left unchanged and only the host clock frequency
(BCLK) was increased. Since the frequency of the other board subsystems is derived from the
base clock, the memory speed will be increased as well, this can be seen in Figure 8 as
1186 MHz memory frequency.
This increase may affect system stability, and, therefore, memory timings and voltage
adjustments in the BIOS memory section might be necessary for system stability.
Refer to Section 5 for more information on memory settings.
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