It is possible in an older game. My old 2007 card could get 1250fps in a really old 90s game
7850 isn't quite as amazing as people are making out. It's certainly a capable card, but GTX650 Ti is right inbetween that and the 7770. And it's actually the GeForces that have all the features - nobody has mentioned that the 7770 has no features. If you get a 7850, you're best off getting the 2GB version, but it's barely any price increase then to get a GTX660 which is easily the best of all these cards.
EDIT: Here's how they stack up and why I'd take the GTX660 - http://www.tomshardware.co.uk/far-cry-3-performance-benchmark,review-32584-5.html