I am also encountering this problem where it drops to ~400 MHz. I am running dual 4Ks connected with the DP expansion cards on the left side of the laptop. On the right side I have the USB-C for charging + USB-A for a hub which has my keyboard, mouse, camera and microphone.
I have the machine loaded up with 32 GB RAM and am using VSCode + MS Edge for web app development. All of my heaving lifting is done on a remote docker container so I don’t think I am over-taxing the machine. I am basically using VSCode as a editor frontend and then of course the browser. No compilation is done on the machine.
This normally runs okay but when I do a Zoom video + screen share on one of the 4Ks, the machine regularly goes to 100C and then throttles down to 400 MHz. These Zoom screenshare sessions are typically 8 hours a day as pair programming is the normal way of business for the place I work.
Am I driving the machine too hard or is there a legitimate thermal issue? I did see talk about a different thermal paste. Would that remedy this issue? Is there some other thing that could improve this?
I really love the laptop and the concept here, but it’s real difficult when the CPU clocks way down and the whole system drags for a min or two.