Just quoting max Db levels misses my point
I think the averages are more important than max level anyway.
how often does the laptop need to spin up to max? what constitutes 'load'? [...]
Just because the laptop does move more air (and get louder) if you really need it to doesn't mean its going to be doing it all the time, or even on a regular basis.
Playing games, for example, will do it. A modern game will load your thermally machine close to its maximum (especially if you have v-sync off). The reason for this is how games work — they try to grab as much computing resources as they can, redrawing stuff as frequently as your machine can handle. If you want to test how loud the laptop gets, just start a 3D game — any game — with v-sync off and let it run for a while. And regarding fans... you don't have much choice if your GPU is pulling 90-120 watts of power continuously. To dissipate that passively you'd need a radiator of a considerable size.
the Mac will almost certainly spin up the fans sooner for a comparable load because it's smaller and denser with a smaller heat sink. Basic physics of heat dissipation
I am not sure that you can make this kind of sweeping generalization. This has to be experimentally verified. Yes, the Mac as smaller thermal transfer capacity. But it also does not have the hot GPUs of larger gaming laptops. Comparable load is actually a misnomer since load is relative to the hardware specs. The work load is unfortunately to normalized. Under full load (CPU+GPU) the MBP is drawing around 90-100 watts of power, in games it will be closer to 80 watts continuous. A large gaming laptop's will draw almost the double of that while gaming.
I think you are perfectly correct that if one were to normalize the performance somehow, that is, if we could run a game at same visual settings and fix it to run at same exact FPS on a MBP and a large gaming laptop, the gaming laptop would run very cool and quiet — but unfortunately, this is not how things usually work. Gaming laptops are more powerful, but they will also do proportionally more work when running games.
(also you cut out the part of my post mentioning comparable internals)
I just had a quick look of a bunch of gaming laptops equipped with 1660/1600ti (including Blade, Lenovo Legion, MSI GF65, Asus Zephyrus), and their average fan noise levels under load are between 40 and 50 dB. Given the fact that most of these laptops are larger and heavier, use smaller batteries and utilize direct airflow (with large vents just underneath the heatsinks), I'd say that, the MBP is dong very well in comparison — relatively speaking of course. It is clear that in terms of gaming performance, these laptops are going to be better.
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It's obscene that Apple put a 460 in a MBP at all, even in 2016. There's absolutely no justification for it. People who bought MBPs before the inclusion of the Navi architecture in the 2019 16" Macbook Pro were ripped off big time. Apple's refusal to use Nvidia in their computers has been to the detriment of Apple users like us. This is the first time in a long while that AMD has had GPUs that came so close to being on level with Nvidia.
You are being a bit overly dramatic here. The 460 was a perfectly adequate GPU in 2016 and compared well with Nvidia offerings at the time (950M and 960M). It 2017 and 2018, not so much, since Nvidia had a new GPU gen (GTX 1050) while AMD had nothing.
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Frankly speaking, it's not meant for MBP class laptop. At the same time, PC laptops of similar class and form factor used atleast mobile 1060. Vega 20 or atleast 16 should have been included in 2016 MBP
PC laptops of similar form factor used a 950M or 960M. Mobile 1060 is double the TDP. As to the Vega... kind of difficult to use a GPU that doesn't exist (it was only available in 2018 and the high cost and low availability of HBM VRAM made it not feasible as the default GPU choise).