Windows is not an issue, as the HD will be replaced, and a new one installed to run openSUSE 42.3. I have always used Intel graphics, and some older AMD Radeons. I would like to hear the pros and cons of each graphics configuration in a Linux (specifically openSUSE although a copy of Ubuntu will be loaded also).
I own a number of older desktops most of which came with nVidia graphics. I got tired of the extra effort in having to install the nVidia drivers and now use nouveau instead. I am sure that the nVidia drivers are superior but then I don’t play any games and the nouveau graphics rendering is good enough for me. In your case I would choose the AMD Radeon as it comes with more memory, unless of course you plan on playing a lot of action games.