Is that card 4 years old?
I'd recommend changing it up if you're planning to play any of the games coming out in 2014 - 2015 to be honest, my old GTX 780**(or.. I think that's what I had.. I cant even remember) couldnt handle most of the 2013 games in medium (BARELY medium settings was how I rolled..) and 1GB VRAM is quite MINIMUM to be able to even run most games that come out nowadays.
I'm sitting on a Radeon 280 R9 card on 2GB VRAM and it's doing quite nicely, i'd imagine a 750 TI to do quite fine the next few years

Whose eyes are those eyes?