To eliminate any thermal throttling cases, I tried stress testing the CPU when it is at 3.0 GHz.
When CPU is stuck in 0.8 GHz, or 2.x GHz, they never reach 3.0 Ghz.
#CPU THROTTLED DRIVER#
Uninstalled Intel Collaborative Processor Performance Control (CPPC) Driver And like 1, stress test won't 'boost' it too. Result: CPU sometimes works at 3.00 GHz all the time, but in a few hours it comes back to 1.50 to 2.00 GHz. Even stress tests won't bring it back to normal speed.Īction: Start to 3 and restart (with and without battery) Result: CPU sometimes works at 3.00 GHz all the time, but in a few hours, it comes back to 0.80 GHz and stays there permanently. Why is it happening? It should work at max clock speed right? Why turbo boost won't work in this case?Īction: Start to 1 and restart (with and without battery) Energy Efficient Optimization = Disabled.Ĭomputer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\intelppm.Īction: Start to 4 and restart (with and without battery).The following are the things I have tried. But the clock speeds are either stuck at 0.89 GHz or 2.00 GHz. My laptop battery died a few months ago and as I have a home inverter, I've been using it with AC power without the battery. I have a laptop with Intel i7-4750HQ processor 2.00 GHz base speed and turbo boost up to 3.00 GHz.
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