Open the terminal. Most tools available on Linux don't show the actual speed that the processor is running at. Intel has released a tool called turbos that that you can use to check. You'll need to install it manually through the terminal.
Type .uname -r and press ↵ Enter. Note the version number that is displayed (X.XX.XX-XX).
Type .apt-get install linux-tools-X.XX.XX-XX linux-cloud-tools-X.XX.XX-XX and press ↵ Enter. Replace X.XX.XX-XX with the version number from the previous step. Enter your admin password if prompted.
Type .modprobe MSR and press ↵ Enter. This will install the MSR module that you'll need to run the tool.
Open another terminal window and type .openssl speed. This will start the OpenSSL speed test, which will push your CPU to the maximum.
Return to the first terminal window and type .turbostat. Running this will display a variety of readouts about your processor.
Look in the .GHz column. Each entry is the actual speed of each core. The TSCcolumn is the speed reported normally. This allows you to see the difference your overclock is making. The speeds will look low if you aren't pushing your CPU with a process.
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