Laptop CPU Clock speed occasionally dropping to ~398 MHz while in use but not thermal throttling

[EthoEtho]

Starting recently, every few minutes my laptop cpu slows down its clock speed from a fluctuating 3000-4200 MHz to a steady 395-398 MHz, causing massive lag spikes slowing the whole system down. Usually it only lasts a fraction of a second but sometimes it lasts almost a minute. It happens while under no, medium, and heavy load, but a little more often at higher loads. Looking at the cpu/gpu/motherboard temps using HWMonitor when it happens, its not just thermal throttling as it happens while near idle at 40-50C as well as under load closer to 90C.

Interestingly, these lag spikes only happen while my laptop is plugged into the power adapter. While on battery it runs at 1500-1800 MHz (~65C) without experiencing the same drops in clock speed. Additionally, whenever the extended drops in cpu clock speed happen while plugged in, unplugging and replugging the laptop from the power adapter instantly ends the lag spike.

My initial thinking is that it might be an issue with a faulty charger not providing enough/reliable power but replacements seem pretty expensive to test a hunch, so looking for any other suggestions before I go that route.

[Serg01254]

Hi,

Same here. Pavilion Gaming 15- ec2010ur (ryzen 5600h, gtx 1650).

From what i have found out the most probable culprit is some faulty sensor that is sending BD Prochot.

System test on start-up returns me some kind of mistake with my power adapter. So I tried two new power adapters (one is of the same 150w, another is one step higher 200w, both are not by hp) and the result with both new ones is the same as with original. Same mistake and same drops in frequency and fps while playing dota to unplayable 2-10 fps and 400 mHz.

The major concern regarding to my config with ryzen 5600h is that i have not found any solution to disable PROCHOT and see if it helps. ThrottleStop is for intel and Ryzen master is for desktop cpus.

So i took to the post-warranty service and waiting for the results.

Best regards