Tuning the CPU frequency

To tune the CPU frequency of a system, perform the following steps:

Verify whether the CPU frequency is already tuned.

# cat /proc/cpuinfo | grep Hz

model name      : Intel(R) Xeon(R) CPU E5-2643 0 @ 3.30GHz
cpu MHz         : 3300.179

If the CPU frquency displayed by the cpu MHz and model name attribute is the same, then the CPU frequency is already tuned. You can skip the next steps.
If the CPU frequency displayed by the cpu Mhz and model name attribute is not the same, then follow the next steps to tune the frequency.
Go to system console and restart the system.
Press F11 to enter into BIOS settings.
Go to BIOS menu > Launch System setup > BIOS settings > System Profile Settings > System Profile > Max performance.
The menu options might vary with system type.