So I bit the bullet and got the best 16" money could buy but I don't think Apple ran it through its paces before giving it the green light. I just wanted to have something solid and reliable moving forward as Apple has been removing things like Display Port support on the 2008's natively and I really did not want to hack it any further to keep using it. And I have been able to run Mojave and Catalina on it. I have a 2008 Mac Pro that has way more fans inside and it doesn't make any noise. What is strange is the machine runs hot when it's only running Safari. Right above the touchbar my maxed out 16" MBP gets super high. You'd think Apple would put in identical fans. The min is 1836 on one and the other is 1700. I don't know why the fans are different but they are. On of my fan's max RPM speed is 5616 and the other is 5200. I get this a lot on the new 16" MacBook Pro. Running only Safari and my fans are running on high. Please start a support case with Apple so we can get this resolved sooner than later and it will also protect you a bit more if you need to return your units beyond the return policy. Hopefully Apple can find a solution because these new 16 inch MBP could be incredible. We have installed Parallels and ran Windows 10 on three monitors on separate space and have done Geekbench tests and a variety of stress tests with the eGPU and its operating normally.īottom line, the combination of using the GPU and CPU is pushing the MBP into heat conditions causing the FAN issues and in our case, possibly damage to the GPU.Īpple had a similar issue with the 2018 MacBook Pro and people were starting to stick their machines inside a Freezer to see if they could avoid the CPU’s from stepping down prematurely. But as many of us have noticed, when we don’t have an eGPU, we’re seeing this at 5% to 10% CPU. When the eGPU is connected, we can push the MBP to about 60% CPU for sustained periods before hearing the fans at about 4500 RPM. This was producing about 38 degrees less heat in Airflow on the MBP. The one USB-C cable to the eGPU is powering the MBP but also the eGPU has the two Display Port cable to the monitors. Just so you understand our configuration with the eGPU: We have one USB-C Hub connected to the MBP and one USB-C cable connected to the eGPU. From all the testing and heat generated by the unit, it looks like our Radeon Pro 5500m GPU is fried because we are seeing artifacts on text (laptop display and external monitors) but not when we use the eGPU. (I.e., for power, USB-C hub, USB-C to Display Port video cables). It became really clear the combined heat from the internal Radeon Pro 5500m GPU and the i9-9880G CPU is too much for the current thermal management system, especially when using all USB-C ports. In our final testings, we did clean installs with 10.15.2 and primarily tested an eGPU using a Razor Core and a Radeon RX Vega 64 so we could eliminate the internal GPU in the MBP. That said, it IS related to having monitors connected and the internal GPU within the MacBook, along with the CPU and the overall heat that both generate. This thread is getting a little side tracked with monitors and so I wanted to point out that these issues discussed are completely unrelated to brand/model of monitors being used. We are kind of wrapping up all our testing and working with the Apple Business Team to figure out how we move forward.
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