Thank you all for your advise.
i wish everyone the best with their issues!
I will post my results of my Apple visit on Saturday 🙏
I found the following on gearslutz:
not sure if this might bring any light to the
fan issue:
On my full maxxed out mbp 16" with Radeon 5500M 8GB its pretty easy:
- some apps force to run on the AMD GPU. On my machine these include Logic, Ableton, Cubase, Serato DJ Pro, Native Access. There may be more, but I havent checked everything yet. You may observe this, when looking into activity monitor: click into the energy tab, there will be a 'Yes' if an app is forced to run on the dGPU. You will also notice a massive increased power consumption, when looking into iStat Menus (you need to separately download the sensors add-on from the Bjango homepage to monitor power consumption). For most apps, iStat Menus shows 15-20W power consumption for the 'Radeon Highside' as soon as some elements of the GUI are animated. As this wasn't enough insane, Serato DJ Pro tops out at 25-30W for literally doing nothing graphical demanding. When no GUI elements of the demanding app are animated, the AMD GPU idles at 6-8W.
- connecting one of my external 4K monitors forces everything to run on the AMD GPU. In activity monitor the GPU utilization (could be found in the window menu) changes from internal to the Radeon. iStat Menus shows a power consumption of 18-20W for the 'Radeon Highside'.
- when the AMD Radeon completely idles and everything runs on the Intel GPU, it consumes 0.15 to 0.2W.
The AMD GPU sits together with the Intel CPU on the same heatpipe. They share the same thermal budget. Those 20W the Radeon consumes, heat up the CPU and will force it to throttle down sooner. And/or will ramp up fan speed earlier and stronger.
I dont know if it makes a huge difference if you have the 5300M or the 5500M with 4/8GB on your 16" macbook. Theoretically the 5300M and 4GB should consume less power.
My opinion: Apple should drastically reduce the power consumption of the AMD GPU. Sacrificing 20W on a laptop for doing nothing more than moving the locator in your DAW is absolutely unacceptable. This light workload should not trigger to ramp up all shaders and VRAM at full frequency. We are not playing heavy 3D games here. Its even worse when using an app like Serato DJ Pro: In addition it also has an insane CPU demand and together this leads to draining the battery, even when the charger is connected. When playing from battery only (fully loaded) whithout charger, game over after no more than 1 hour. Thats 100% what the DJ wants, shutdown due to battery drain...
Alternatively app developers should rethink if they force their apps to utilize the AMD GPU (dont know if it depends on which API for graphics they use). Most Apps should run fine on the Intel GPU. Well Serato is another kind of beast. Even when disabling CPUs turbo boost it stresses the CPU more than using the AMD