What Graphics card is better for gaming?

Ok so im on a budget and i have the choice between Nvidia GTX 650 1gb or Nvidia GTX 650 2gb , and i was just wondering what is better for gaming? if i get the 2gb, i have to save up abit longer, but is it worth it? and if you know the average FPS for one or both on any game, please tell me in your answer. please... show more Ok so im on a budget and i have the choice between Nvidia GTX 650 1gb or Nvidia GTX 650 2gb , and i was just wondering what is better for gaming? if i get the 2gb, i have to save up abit longer, but is it worth it? and if you know the average FPS for one or both on any game, please tell me in your answer. please can you also tell me the differences between the two graphics cards? thanks in advance!
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