Surface Book 3 Throttling at 0.19 GHz

Hi, so today I have been playing some games: Shadow of the Tomb Raider and Alien Isolation. There were no problems with the CPU throttling. In Shadow of the Tomb Raider, when I'm in the village with a lot of people, the game really slows down, but not due to CPU trhottling. Alien Isolation runs perfect.

I was also doing some Zoom videoconference, and sharing screens and audio with some friends. Then, the CPU started to throttle and it came down to 599MHz. I didn't even reach very high temperatures (max 89degC) and when the CPU was at 599Mhz the temperatures were not even 60degC. It's true that the computer didn't stay locked at that CPU speed and it came back to normal speeds. See image below with the tempertatures and CPU speeds.

Now, my question is: is this normal? Does it happen to you too? Is this an issue with the SB3, or is it a bad optimization of Zoom?

In case it's of interest, I am having the same problem on my Surface Pro 7, core i5.  It's always the same speed that you are all seeing: 0.19GHz.  I wonder what is magic about that speed?

MS Support has so far been of no help.  I don't believe the person I am in contact with knows what CPU throttling is.

This one of the few discussions I've been able to find on this subject.  Unfortunately there seems to be no overriding solution.  All I can do is keep booting, and hope for a good one.

I'm on version 26.20.100.7873 but I have to try different scenarios to see if it throttles again.

As I have said before, I had throttling issues at 0.19GHz while gaming (whit the dGPU) before I installed the latest Surface firmware and made the change in the System Configuration -> Boot and checked 8 processors (but not sure if this one reallly had any influence). After that it has been OK.

I'll continue to check and report back.

Some more findings:

For testing purposes I installed the current Intel Graphic driver 27.20.100.8476 from the intel.com site on the SB3/13". After that the system immediately overheats - even if you don't run any specific application. So don't try that - It's even hard to remove the drivers after a cold boot before the system shuts down. That would kind of explain the reason for overheating conditions during graphics intense video meetings.

It also fuels the qualified guess that the Iris Plus drivers are key to the solution - my current (somewhat) working version is 26.20.100.7873 from 2/14/2020.

Probably due to the overheating condition of the graphics the main processor speed got decreased so significantly - the locking behavior at 0,19GHz seems to be fixed with the July firmware.

However, in certain scenarios the notebook still overheats - especially when using multi-monitor setups.

Maybe some of you could check their versions of the Iris Plus Driver to compare.

Did the MS agent pointed out what was the problem? What sort of checks did he do and what were the results?

I've had my SB3 for around two weeks and I haven't had any more throttling issues, but I definetly have strange things happening. For example, several times, while watching a 1080p youtube video, the video itself started to roll horizontally without stopping! Also, while watching a youtube video someimtes there are orange/pink shadows around the edges of the person speaking.

I've had no performance issues while using SolidWorks 2018 (with big and complex assemblies), Mathematica 12 and MATLAB 2016.

During the weekend I'll play a game that will push the SB3 and I'll try to use Zoom to see how it behaves..