Operating system: Darwin-17.7.0-x86_64-i386-64bit 64 Bits
Graphics card: NVIDIA GeForce GTX 980 Ti OpenGL Engine NVIDIA Corporation 4.1 NVIDIA-10.33.0 3184.108.40.206.40.137
Broken: version: 2.90.0 Alpha, branch: master, commit date: 2020-07-09 17:04, hash: rB3623db7784b3
Worked: (newest version of Blender that worked as expected)
Short description of error
I reported a similar problem (T78581) and my report was deleted because the video card was outdated (ATI Radeon HD5770 )
I upgraded the video card to an Nvidia GTX 980 Ti but get the same result.
Any attempt to view on screen with Cycles and a mesh in the model causes instant crash.
The replacement video card comes within the list of supported video cards.
It works fine in 2.83 and is recognised as a CUDA enabled GPU.
It is NOT recognised as a CUDA enabled GPU in 2.9, however.
Is the list of supported cards changing and out of date?
Exact steps for others to reproduce the error
Open a new document add a mesh attempt to switch the viewport shading to Cycles... crash every time
Thanks for looking at this... Chris