How to enable Intel Turbo Boost Max Technology on HP Laptop with Intel Core i7-1255U

[Err_404NotFound]

CPU: Intel Core i7-1255U

GPU: Intel Iris Xe Integrated Graphics

RAM: 16GB DDR4

I have been trying to download a game on the Xbox app, however my Intel Core i7-1255U CPU has been staying around 2.5Ghz, even though my CPU was advertised to have a max clock speed of 4.7 Ghz with Intel Turbo Boost. I have tried looking for a solution in BIOS, but the BIOS has nothing in it to do with improving performance or Turbo Boost. How do I get the CPU to automatically boost the Clock Speed to 4.7Ghz?

[TzortzisG · Accepted solution]

Hello Err_404NotFound.

Usually HP laptops have an appropriate setting in the BIOS, however your specific system may not have this option. The multicore post-TigerLake CPUs tend to have the Turbo Boost capability enabled by default on all systems, and this is because the base clock is very low. For the 1255U base frequency is 1.7GHz on performance cores and 1.2GHz on the Efficiency ones.

Alder Lake (wiki) 

2.5GHz for this processor means that Turbo is enabled. Unfortunately these multicore CPUs are very complicated and the thread director works together with Win11 -and the many relevant windows settings- to control the processor's various aspects in the "optimum" way. If one is not happy with the end result, one needs to try and take control of the CPU's behaviour, but that's easier said than done. Throttlestop, a third party portable tool created and maintained by Unclewebb, would be a good start since you can monitor the CPU's performance and tweak various settings.

On Throttlestop's forum you can get support on using the program and solving any issues you're having with the Intel CPU's behaviour. I found two relevant discussions, one concerns a HP 15-f series laptop with Turbo disabled, and the other an Acer Aspire with Turbo on. They both have a i7-1255U.

To get Alder Lakes to run at their higher frequencies, they have to be forced to do so. Using the more powerful Windows power plans (High performance, or even better Ultimate Performance) is necessary. Speed Shift should be changed to its most aggressive setting (0). Many times this is not enough, and the many hidden settings controlling the P and E cores must also be altered. From my experience with the Alder Lake -U systems, they're designed to be very power-efficient. Getting them to prioritize performance needs a lot of work......