Most of these systems vary the speed of the CPU depending on what it actually needs i.e it saves power and reduces heat when running at full speed is not required and would make no processing difference.
I would leave it well alone.
Fujitsu Lifebook P727 laptop review
Best of the Grad Shows 2017: University of the West of England (UWE)
Best value Mac: Which is the best £1249 Mac to buy
Les meilleures GoPro 2017