Best GPU for price

Hello. I want to buy a new GPU for my PC. I don't play new AAA games, so my budget is -100 USD. (89€ because i live in Europe.) I want a Graphics Card that doesn't draw a lot of power. I don't want to upgrade my PSU because I already tested GPUs that didn't draw a lot of power and they didn't...

I recently played FARCRY 4 and i tried different graphic settings.I tweeked it to get 30+fps.But my discovery is stunning.I tried to off AA and i got 30-31 fps.But when i turned on SMAA,fps went to 38-40 fps.I said WTF?So,the question is can SMAA fix my all games performance problem?If it really...