Macbook pro 16 '' get hot just connected to LG UltraFine 4K

[Kolvac_S]

Hey everyone, I just received my LG UltraFine 4K monitor today but unfortunately, my mbp 16'' just got much hotter as soon as connected to the monitor.
Normally, the CPU temperature is around 40° without load，but with the monitor the CPU temperature is always around 65° even when there wasn't any tasks, and even got over 80° when I see a youtube video.
I have tried to re-connect and restart my computer for many times it just won't work.
Could anyone give me some suggestions about how to deal with this problem? Thanks a lot!

PS: My mbp 16'' is running on MacOS Catalina 10.15.7, with 2.6 GHz 6-core Intel Core i7

 

[ian87w]

Correct me if I'm wrong, but from what I read, whenever a Macbook pro with discrete GPU is connected to an external monitor, the discrete GPU will be used all the time, resulting in more heat.

 

[Kolvac_S]

Correct me if I'm wrong, but from what I read, whenever a Macbook pro with discrete GPU is connected to an external monitor, the discrete GPU will be used all the time, resulting in more heat.

Yeah from what I have read about, you are right. Maybe we can find ways to ease the problem. Actually I find that "clam shell mode" will ease the problem for a little bit, which make the CPU about 50+° instead of 65+° without heavy task.

 

[Jeo_cz]

Well, hello! https://forums.macrumors.com/threads/16-is-hot-noisy-with-an-external-monitor.2211747/

 

[prospervic]

If you haven't already, try plugging the LG into the RIGHT-SIDE ports on the MBP. These have a higher power ceiling and thus generate less heat.
No, I'm NOT JOKING. It made a HUGE difference for me with my MBP 16 inch and the LG UltraFine 5K.
Check it out:
You might be charging your MacBook wrong: What you need to ...

 

[BluAffiliate]

Sadly my MBP 16' gets to 80-90 degrees under low load like using safari and what not.
Always been like this, and there's no fix. These machines just can't handle any use.