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Dell XPS 15 9650 CPU stuck at 0,8 Ghz

Hi I have tried a lot of suggestions allready to try to get the CPU multiplier unlocked again but with no luck.

So I was hoping still has a tip/pointer for me to try.


What I allready tried is:

- disassembled everything to I could unplug the CMOS (its under the keyboard pfff)

- updated bios

- unplugged battery

- unplugged battery and pressed power button 30 seconds

- tried different things in Dell Power Manager

- tried different things in windows power manager


The only small progress I had is to run ThrottleStop, but after reboot or sleep/wake its again stuck at 800 Mhz so not a solution. 

Hope that somebody can help. Thanks !

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