Pretty sure all of Nvidia's GPUs still support Windows 7, and most of them support Windows XP still I believe, up to at least the 900 series. You might have to do some digging to find proper XP drivers, as I don't think Nvidia still lists them on their site, but I imagine they're still on their server, or there are mirrors from others to use.

AMD, on the other hand, dropped support for Windows XP in 2013, so any GPU made after that date from them won't work at all.

 

(Stop being nostalgia's bitch and just get windows 10. It's infinitely better than 7.)

Well you can get use windows 10 if you dont mind Microsoft spying on on your pc, but id rather keep what i have instead of getting a buggy inferior version of windows thanx. There are some cards that still support win xp also tom, because a i saw a few in store a few months back. I think they were part of the gt line of cards, and it was a nvidia 1080 i think that's the max that showed support for xp.