I've just replaced my AMD Radeon Vega 64 with the old AMD Radeon R9 Nano. I was considering the Pro WX 7100 card but decided not to go with that because of $.
The R9 Nano is much smaller in form factor and thus produces less heat. R9 Nano does not support H265 decoding. For now I could live with that as long as I could watch YouTube and play 3D open sourced games.
The card is fully compatible with amdgpu driver (Linux 5.6.14 on Fedora 32). I have to disable the onboard VGA and remove the AST GPU Xorg config snippet and let the Linux driver auto-detect my screen settings.
As you could see in the photo, the 8X PCI-E NVMe adapter card is so close to the GPU fan, I don't think it is ideal for heat dissipation.