PL1 and EDP OTHER red when under load

[batocelot]

Hello everyone,

I just cleaned my laptop and reapplied the thermal paste. When I start the Cinebench, everything is fine, The CPU draw around 80-85 watts and the temperature is about 80 degrees. After that, the laptop's fan starts to spin and when it reaches max fan speed, I immediately get PL1 and EDP OTHER red under "Limits" in Throttlestop. The laptop is a 2019 HP Omen 17 with i7 9750h and RTX 2060. You can find screenshots below. Am I doing something wrong?. Both CPU Core and CPU cache are undervolted to -75mV. Couldn't find a solution to this elsewhere. Any help will appreciated!

 

[unclewebb]

Am I doing something wrong?

Your settings are correct. The problem is that the 9750H has a 45W TDP rating. HP is using an embedded controller (EC) to enforce a long term limit of 45W. That is why you are seeing power limit throttling right at 45W.

There is no fix for this limitation. ThrottleStop only lets you control the MSR and MMIO power limits. When the EC power limits are set to a lower value, the lowest power limit gets to control the CPU and power limit throttling is the result.

Some manufacturers do not use an EC to set any power limits. Laptops with a 9750H and unlimited power limits can run fully loaded much faster compared to the same CPU in a laptop which is enforcing a 45W turbo power limit.

 

[batocelot]

Thank you for the clarification Mr unclewebb. It's sad that I cannot utilize the potential of my CPU because of the embedded controller, although it's not thermal throttling. I'm thinking about completely ditching this laptop and build a desktop instead.

 

[batocelot]

Update: Turns out my power throttling is caused by a faulty fan. It started to make a screeching/rattling sound and I decided to change it. Now it can consistently draw +85w of power.