Radeon HD7770...it's okay still for the mainly retro, pre 2010, and strategy games I use it for. I only got that one because the previous card died on a Friday, and it was the only thing the local MSY store had in stock before closing for the weekend. At least it's lasted 5 years so far.

My Win 98/DOS/CRT PC has an Nvidia Riva TNT (the very card that made Nvidia a force in GPU's) coupled with an original and still functional Orchid Righteous 3dfx card.

I used a 560ti for several years and upgraded to an GTX 980 shortly before the Ti was announced (I still want to hit myself for not waiting a bit longer).

In June I upgraded to a Radeon 460 from a Geforce GT620. HUGE upgrade and now I can play every game in my backlog on high settings. a 470 would have been more cost-effective on a dollar-per-performance measure, but I only had $100 and this is plenty of performance for titles at least a year old.

GTX 770 - dumb me bought that a month before 970 hit the market( wasnt that much into hardware back then.. oh well)

I have had a GTX 980 ti since 2015. Before then I had a Radeon HD5770 for five years.

Nvidia GTX 960 - more than enough for my needs.

Laptop - Geforce GTX970M
Desktop - 2x Geforce 980TIs in SLI

I upgraded from a GeForce 220 to a Radeon R7 240.

AMD R9 280X

upgraded from a EVGA GTX 970 to a EVGA GTX 1080 ti FTW 3 GAMING because the performance I wanted in Mass Effect: Andromida wasn't doable and I could play GTAV in a 720p window when I wanted bigger. I figure the card will be future proof for quite a while (the free game that came with it too helps). It's amazing how much the 970 held me back (ie no maxing settings for some games @1080p or low framerates).

nVidia "GeForce GTX 650" works fine for me. No plans on upgrading as of now.

GTX 980m. The Witcher 3 and Rise of the Tomb Raider get about 35 fps average on ultra so I'm pretty happy with it. No plans to upgrade in the next 3 years.

A Geforce GTX 960 on W7 pc, upgrade afew months ago, next time i do one, it will be a new PC, maybe next year or the year after depending on current games i play.
A Geforce GTS 250 on my XP pc.

A GeForce GTX 660 Ti. Still works fine for the games I'm playing.

EVGA GeForce GTX760 SuperClocked 2GB GDDR5 256bit and I have not really used it too much in the sense of pushing its limits to run some graphically demanding title since most of the stuff I play is older stuff. If I upgrade to a 1070 in the future I sure hope it will be able to run Sid Meier's Alpha Centauri as well as my 760 does :P Joking aside, I'll probably get some use out of it when Elex and Bard's Tale IV comes out. These two games should give it a good chewing.