4 ms·

I have the 16" MBP (late-2019), really annoyed with the heating issues. Any time I do anything intensive, like edit raw images in Lightroom, at some point tempe

by asenna 5y ago

I have the 16" MBP (late-2019), really annoyed with the heating issues. Any time I do anything intensive, like edit raw images in Lightroom, at some point temperature rises which makes some "kernel process" pretty much hog up all the CPU and the machine starts lagging severely. Looked up online and this is quite common.

downWidOutaFite 5y ago
Yea it's especially common when running external monitors. The conspiracy-minded would say Apple wanted to leave a reason for MBP buyers to upgrade to M1 laptops.
- awill 5y ago
  Using any external monitor requires turning on the discrete GPU. I'm sure that's a large part of the problem.
  - muro 5y ago
    Why would that be required? The embedded GPU should be good enough for many things.
    - cassianoleal 5y ago
      Poor drivers. The same reason why the discrete GPU pulls around 20W just for being on with an external screen, even if the screen is black. Apparently not an issue: * in clamshell mode; * on Windows via BootCamp. According to some reports in the MacRumours forum [0] this is fixed in Monterey. [0] https://forums.macrumors.com/threads/16-is-hot-noisy-with-an-external-monitor.2211747/ https://forums.macrumors.com/threads/16-is-hot-noisy-with-an... Edit: Not quite a fix. Apparently they introduced a Low Power Mode that helps bring wattage and temps down by essentially preemptively throttling CPU and GPU or something like that.
      - Aeolun 5y ago
        > by essentially preemptively throttling CPU and GPU Not really a fix then. That may prevent hurting your machine but it’s still not running at optimal performance.
        lupire 5y ago
        The GPU overheats because it runs at high clock (and 18W) even when doing 10% work.
        cassianoleal 5y ago
        Indeed. I disable turbo boost on my 16". It hurts peak performance but runs (slightly) cooler and quieter, and sustains for longer. This reads all kinds of wrong.
eyelidlessness 5y ago
It’s come up before but still not everyone knows: you may want to try plugging the power cable on the right side. It can drastically reduce this throttling.

by asenna 5y ago

downWidOutaFite 5y ago

Yea it's especially common when running external monitors. The conspiracy-minded would say Apple wanted to leave a reason for MBP buyers to upgrade to M1 laptops.

awill 5y ago
Using any external monitor requires turning on the discrete GPU. I'm sure that's a large part of the problem.
- muro 5y ago
  Why would that be required? The embedded GPU should be good enough for many things.
  - cassianoleal 5y ago
    Poor drivers. The same reason why the discrete GPU pulls around 20W just for being on with an external screen, even if the screen is black. Apparently not an issue: * in clamshell mode; * on Windows via BootCamp. According to some reports in the MacRumours forum [0] this is fixed in Monterey. [0] https://forums.macrumors.com/threads/16-is-hot-noisy-with-an-external-monitor.2211747/ https://forums.macrumors.com/threads/16-is-hot-noisy-with-an... Edit: Not quite a fix. Apparently they introduced a Low Power Mode that helps bring wattage and temps down by essentially preemptively throttling CPU and GPU or something like that.
    - Aeolun 5y ago
      > by essentially preemptively throttling CPU and GPU Not really a fix then. That may prevent hurting your machine but it’s still not running at optimal performance.
      - lupire 5y ago
        The GPU overheats because it runs at high clock (and 18W) even when doing 10% work.
      - cassianoleal 5y ago
        Indeed. I disable turbo boost on my 16". It hurts peak performance but runs (slightly) cooler and quieter, and sustains for longer. This reads all kinds of wrong.

eyelidlessness 5y ago

It’s come up before but still not everyone knows: you may want to try plugging the power cable on the right side. It can drastically reduce this throttling.