AMD GPU fluctuates utilization and clock speed on restart

Question

I'm trying to play Civ6 at bare minimum settings and my hardware reaches recommended requirements, but sometimes when I boot the game it runs at 5fps with very little GPU utilization and ~ 200MHz clock speed.
My current fix is to reboot my machine and load in again, which sometimes does fix the problem and I get ~60fps with a GPU clock speed ~1000MHz.
Any tips on how to get more consistent performance?
Specs:
HP Elitebook 840G5 with built-in AMD Radeon RX 540 updated to latest driver version.

BlueRaja - Danny Pflughoeft · Accepted Answer

AMD has a feature called "Cool and Quiet" which a lot of people have been having issues with lately.

Make sure you have the latest chipset drivers installed.
According to this post by an AMD employee, monitoring tools such as CPU-Z can screw up the Cool and Quiet feature. They recommend AMD Ryzen Master Utility
If all else fails, you can disable the feature in the BIOS.  You could also try setting "Power Plan" to "High Performance" in Windows (Control Panel --> Power Options --> Advanced). Note that both of these will reduce battery times.

AMD GPU fluctuates utilization and clock speed on restart

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