I saw that 2.5.7 was released and I'm giving it a try. So far, I've been able to complete a 30 min session - the best so far! I'll keep using it. I was about to send the eGPU back - Looks like I'll be holding off a little longer!
I don’t think 2.9 is meant to work with Radeon pro render. I have two versions of blender anyway. I use 2.9 to model, with all plugins etc. Then I use 2.83, appending meshes/objects, is the latest LTS version and use RPR from there.
I have same situation as you with eGPU.
I have now installed latest Blender Version 2.90.1 (2.90.1 2020-09-23)
I hav a new #macbook pro 2019
MacBook Pro (16-inch, 2019), 2,4 GHz 8-Core Intel Core i9, 32 GB 2667 MHz DDR4,
#AMD Radeon Pro 5600M 8 GB
Intel UHD Graphics 630 1536 MB
Radeon Add-on version 2.5.1
It looks like Blender is not stable on this new hardware. If I use Radeon for render, it will for sure crash. But I can not tell why and when it will crash. And some times it is running fine to end of a Render.
Radeon Render enabled: Only thing I can think of, is when I use Blender in Solid, it looks like more stable than in Preview or Render view. If I navigate in Preview/Rander view, it will crash sooner or later.
I wold like, so much, to hear what to do, to make it stable using Radon Graphic board. ???????????
For info only:
My old MacBook Pro 13" 2,9 Ghz i5 was running Blender so fine, but here I never used the graphic board. Only cycles Render on CPU.
Hey Frank. Are you using an eGPU? If so see my comment above: Are you crashing in final renders or viewport? If you're using the viewport render with eGPU you need to disable the "GL Interop" setting in the viewport settings.