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HP Zbook 17 G5 CPU power limit issue (PL1 at 23W instead of 50W)

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Posted · Original PosterOP


I have one major issue with my mobile workstation at work. CPU PL1 was at 23 Watt at the start of the system. I could change it in intel extreme tuning utility but it switched right back.

I found this thread at HP support forum:




I've installed Intel DPTF but situation improved just a little.

Now system starts at default 50W PL1. At some point of the day, sometimes after a few minutes or a half hour, laptop lowers CPU PL1 power limit to 23 Watts and stay at this level until l switch it in intel extreme tuning utility to another value. I cannot set it to 50W again because it still raports PL1 as 50W. At the time when PL1 is reduced, HWInfo show correct value of 23W. When I was digging I found that this zbook allegedly lower it's CPU power when some extra power is needed for the GPU, but why the heck it isn't switching back to higher power limit when GPU load is finished? I'm mechanical designer and CPU at less than half of its power is a huge pain in the ass. Switching it a few times a day also is far from perfect.


Can anybody help in some way?


HP Zbook 17 G5 specs:

Intel i7-8750H

Nvidia Quadro P3200

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