Need to upgrade GPU, any advice?

I currently have:

Windows 7 64 bit
i5 3330 @ 3.0 GHz
640 GT
8GB DDR3

I'm having some performance issues when running games. Mostly poor frame rate. I'm not incredibly concerned with running stuff on 'Ultra' or variations of that, but I do want to run it not too low and at max resolution with at least 30-40FPS. 

I've been told my GPU is the thing that's holding my performance back most. I currently run Dust: An Elysian Tale at 20FPS, State of Decay at 5FPS.

I know some cards are known for having good price-performance, but I do not know which ones. Budget is basically around 200 bucks. What am I best off with? 660GTX? 670? Is there much difference between the two? Or should I be looking at something else entirely?

If bang for your buck is your concern, try AMD's 7950. High end card around 200-220$, should max anything without breaking the bank

im waiting for the new cards to be released. i think you should wait as well. see how they are (in terms of price/performance) then decide if you want to buy 7xxx series . Ribnarak

[QUOTE="Ribnarak"]im waiting for the new cards to be released. i think you should wait as well. see how they are (in terms of price/performance) then decide if you want to buy 7xxx series . Zevvion

I'd wait until the next series of cards from AMD is released, which should be in the next week. Be patient. 

Check the Power Supply unit in your PC as well to make sure it can handle whatever card you buy.  It's pretty clear you didn't build this PC yourself, so I'm assuming you got it at a place like BestBuy which means the PSU is likely garbage.

Check the Power Supply unit in your PC as well to make sure it can handle whatever card you buy.  It's pretty clear you didn't build this PC yourself, so I'm assuming you got it at a place like BestBuy which means the PSU is likely garbage.

whitey_rolls

Take it from me who has this card, 7950 is def the way to go. I can run at MAX everything, plus since technically speaking your i3 beats my amd fx 6300, you slap the card I got into your machine, you will be good to go.