Small case, excellent thermal management
From a simple, binary, "yes or no" perspective, the Mac mini clearly throttles based on the thermal condition. But, this is not a "gate," conspiracy, or anything of that nature. Everything with an Intel processor will adjust speed based on the thermal condition, with the severity of the slowdown and impact on performance depending on how much money you've invested into a cooling system if you've built the machine yourself.
All this said, we're impressed with how the performance on the Mac mini held up as the job progressed and time ticked on. The clock speed averaged out at around 3.4GHz to 3.5GHz under 100 percent CPU workload with the i7 models, but at no point did it drop below the 3.2GHz base clock speed —making it a solid performer even when under load for a long time.
Do you have comparative benchmarks between the Mini and a desktop under load for a long time?
Why would you think that an eGPU codesigned with Apple, where Apple wrote the drivers, to run on Apple hardware would have issues? I chose Black Magic’s eGPU since it appeared on Apple’s website, and I don’t know that market. But there are raw enclosures for $200 that let you put in any card with a supported driver.
1. A two year-old GPU inside the BlackMagic that has roughly roughly half the performance of the GTX 1080 Ti that was state of the art two years ago. Also, for this privilege, we pay $700 for this $200 GPU. https://www.videocardbenchmark.net/gpu.php?gpu=Radeon+Pro+58...
2. Whatever nightmares come with eGPU usage in 2019. At a minimum, it's another box, another fan, another power supply, and a cable. And that's if the software side of things actually works flawlessly in 2019 which, last I checked, was still a little hinky.
3. A CPU that is going to be significantly slower than a well-cooled desktop i7 due to thermal issues. https://appleinsider.com/articles/18/11/14/testing-thermal-t...
Even if you just subtract the eGPU (I don't think most developers care too much about that) this is why a significant number of developers just sort of want a fast CPU in a desktop box. It could literally just be the Mac Mini guts in a bigger box.