maximum cpu frequency limited

Hello,

I would like to run a computing program to 100% of the CPU speed, however my Aspire V 15 nitro-black edition stays at 30% maximum frequency. Some times it goes upper to 100% but then it goes down again to 30% (when I turn on hte computer for example). I think this is for some kind of control in the temperature of the processors, when they arrive at some point, a controller setting in the laptop makes the speed of the CPU goes down to cool it, instead of running the fans faster. There is a way to control the fans and keep the maximum frequency of the CPU at 100%??

Thak you very much!