Turbo Boost power limits have to be changed using the Intel Tuning utility or a similar piece of software that sets the correct registers. Operating systems usually leave those lower level details to the BIOS so installing a new operating system won't do anything unless the system default is set correctly and some bloatware driver is updating it at boot. Usually the manufacturer does it in the BIOS so you have to overwrite it every time you boot; or they do it at the factory, in which case just setting the registers once will be enough (I believe they're nonvolatile?)