Trying out Blender 2.81 with RPR 2.1
Windows 10 PRO
Nvidia RTX2080ti (display)
Blender crashes when going to Object Edit Mode when using rendered view in following Render Quality modes:
Low, Medium, High Quality.
Tried to deactivate RX580 in Device Manager, but same problem. Otherwise RTX2080ti works excellently and extremely fast!
Works fine in Full render quality though...
So the RX580 may not be supported currently in render modes other than full. I would use one gpu. See this issue on nvidia though