Switching off CPU Throttling on CentOS or Fedora

Under CentOS and Fedora, you can switch off CPU Throttling or "Dynamic Frequency Scaling" to maximise your CPU performance. For more information of CPU Throttling, you can also read Dynamic Frequency Scaling from Wikipedia. Just type the command

# /usr/bin/cpufreq-selector -g performance

For Debian-based hardware, you may want to take a look at
Looking at Xorg High CPU Usage Issue for netbook