According to the datasheet the 290(X) does not support OpenGL4.5 and Vulkan.
The 390 (X) but already because I wonder what the difference is.
Up to a higher clock speed and faster memory, the chip is still the same.
Are there still differences or attempts AMD to promote only their newer products?
If it is so, I would unwillingly throw my 295X2 on the wall and in the future resort to Nvidia.