Swapping video card ATI to nvidia - any setup issues?
 

I want to replace a radeon video card with an nvidia one. Is there a recommended way to do this?

If I simply upgrade the hardware, can I then do something like
or will I find the computer can't display enough to get that far?

(Edit: should mention, using debian stretch.)

Thanks & cheers!

Likely best to remove ATI related packages and get xorg working with xorg native drivers, make sure you have xserver-xorg-video-nouveau installed. Then switch out the cards, reboot and hopefully nouveau will be loaded and you'll have a desktop, then install nvidia-detect and run a command by the same name to see what nvidia-driver version you need to install. You can also figure out what version to install by visiting NvidiaDebianWiki.

Traditionally, you must remove all ATI proprietary packages before installing Nvidia as they will conflict and there will be problems. They also (Ati and Nvdia proprietary) require a file in /etc/X11 called xorg.conf to enable them, xorg native drivers don't use that file, so simply removing that file or renaming it and rebooting should get your system using xorg native driver, then you can proceed to removing ATI stuff and install Nvidia.