730 would be better (i had a GT 630 and i can pretty much play e-sport title just fine, but the new AAA titles are only playable at low most of the times....)
but even better, get a 750ti instead (if u're budget is really low that u can't afford the new gens)
new gens suggestion:
1050ti is the strongest + most efficient one that doesn't even require any pin-connector, supposedly (minimum PSU is 300w)