Can new 2019-2021 Macs work with external monitors?

Question

macbook

Hello everyone) I now have a macbook pro 2015, core i7 with a discrete graphics card AMD Radeon R9 M370X 2 GB. When you connect an external monitor with a resolution of 2560 × 1440, the brakes begin, kernel_task loads the processor up to 500%. If you set the resolution to 1080px, then it works relatively well, it heats up, makes noise, but does not lag. Any other resolution, and even less, causes throttling. At the same time, throttling is absolutely useless. If you turn off forced airflow, the processor and video card do not heat up above 70 degrees, which is generally a normal operating temperature for the processor and video card. And at the same time, throttling still starts. I try to connect monitors both via hdmi and thunderbolt.

I like mac os, but sorry computer for so much money, it used to cost 200k, which can't work with external monitors is stupid. My laptop on Windows, which is 2010, is a little older in hardware and can easily handle it.

Now I have a dilemma, whether to buy a new poppy beech or muster up the will and switch to a regular laptop with Linux. After reading on the Internet, I saw that people write about the same problem with external monitors, even on top-end macbooks, what's there, on macs with M1 processors. I want to know your experience if anyone has a new macbook pro. I hardly believe that a computer for 200-300 thousand cannot even pull out a monitor, while laptops on Windows for 15 thousand rubles pull 4k monitors)

Answer 1

Resetting SMC and NVRAM did the trick. Now two monitors work fine, without lags. The only thing is that I still use one external monitor, because when I connect a second video card, I don’t have enough for anything else, even listening to music in the browser, despite the fact that I tried to disable hardware acceleration there so as not to use the video card.
An interesting thing. Before trying to reset the settings, I tried to go to bootcamp windows and test the monitors there. And you know what? They work great there, two monitors, plus the game and everything works well. Mac OS is still a long way from Windows in terms of performance, perhaps they specifically cut down on the capabilities of the system so that people use mac mini and imac. But in reality, the difference in system performance is large. On a Mac, the video card does not work at all. On Windows, the same computer pulls monitors, as if they were not connected, plus the game also pulls on these monitors.
I tried to run the same game on a poppy, it is generally buggy so that even at the minimum it is difficult to play. On Windows, it pulls at maximum speed.
What are they doing there on mac os so that the system lags like that, it still needs to be invented) As a programmer, it’s not clear to me)

Answer 2

Yes, everyone already has experience with new macbooks. I have had it for 9 months, but I was not the first to buy it far.
Now I am writing to you with a connected 4k monitor constantly at 60Hz (macbook pro m1 / 16gb ram) - the warmth of the poppy is at the level of the fingers.

Answer 3

I have macbook A1708, external monitor 34wn780-B. Nothing gets hot, it works stably.
> If you turn off forced airflow, the processor and video card do not heat up above 70 degrees
. It looks like the thermal paste has dried up and the cooling system is not working efficiently.