from GTX275 to 960? of course!
this card is just good enought to handle todays game (Fallout 4, GTA V) in good graphics. BUT if you wanna be safe for the next two years, I would go for GTX980 (pricey!). If you don't wanna spend that much money, just wait 2-3 month, I think NVIDIA will release a new card soon -> 980 gets affordable.
To sum up: Yes, it's a good choice for an occasional gamer. (provided that the specs match to your Mobo, I didn't check that)