Windows 10 uses only half of your processing power during heavy tasks.
Windows 10 uses only half of your processing power during heavy tasks.
Hi everyone! I'm experiencing an issue with my Windows 10 laptop running on an HP 15ac series. When I run demanding tasks like playing games or streaming 4K videos, two of the four cores get idle while the other two work at full capacity. I've tried changing power plans, adjusting settings, enabling hidden CPU power management tools via regedit, using core unparking apps, and modifying registry keys meant to disable core parking. Even when I disconnect the charger, all cores activate unexpectedly. The CPU temperature stays normal, but it seems like something is interfering with core activation. I've checked everything I could find online, but nothing seems to resolve the problem. Any advice would be really helpful! Thank you in advance.
Have you attempted a fresh setup of Windows? This might involve changes made to the device that could be addressed with software fixes. If a clean install of Windows 10 doesn’t resolve the issue, then there’s no solution available since the system was built that way.
Laptops face thermal limitations. When pushed too hard, the CPU may reduce certain cores, turn off turbo boost, or both. Unlike high-performance gaming machines, they aren't built to handle intense workloads continuously. They lack robust cooling solutions for sustained heat. To manage this, set your power plan to Balance (Never High Performance) and avoid power-saving modes like Battery Saver. You might find tools that disable CPU throttling, but use caution—consider upgrading to a better device before experimenting.
It surprised me how lowering performance tweaks could boost speed. I changed to balanced power settings and reset the profile to its default. After about ten minutes, it ran at full load with all cores active for most of the time. Thanks to everyone who helped, particularly GoodBytes.
Yep. Choosing High Performance removes all power-saving options from your CPU and other components, causing the system to heat up more, stopping the CPU from reaching its maximum speed (Turbo Boost), or allowing it to use all cores. Opting for Balance lets Windows coordinate with your hardware to conserve energy, lowering heat and noise while still offering updates on your actions so performance stays smooth without lag. This is why Microsoft is moving away from Power Plans in favor of the "Battery Saver" setting. In short, your system runs under a balanced profile all the time. Battery Saver mode tightens background processes more, like turning off Live tiles when active, so it doesn’t run the scheduler or use the wireless or Ethernet card unnecessarily. Apps that are suspended quickly reduce CPU usage, which improves battery life. This affects how you experience the software, which is why Windows usually activates Battery Saver at 20% or less battery remaining.
I don’t support those cooler models. The reason is that unless everything is perfectly balanced to actually lower the laptop’s temperature, they just create more noise with their weak fans. Even if they work, they offer little real benefit. You’d need a bigger heatsink, which isn’t available for laptops since they’re designed with limited space.
I encountered a similar issue where Windows would disable half of the cores on my laptop using the i3 5005u. Even during full rendering at 100% usage, temperatures rose to around 70°C within about 15 minutes. The fix I discovered was adjusting the advanced power settings for the balanced profile or processor power management to select Passive mode when connected to power. Let me know if this helps!