yeah jyjjy's right 768MB 460 would be great for your res. you can find it for 150$, 560Ti is probably out of your price range, it's 250$+ and only, which are worth buying *imo* are 270$ and you can get 6950 1GB for 215$, which would perform better than stock 560, but worse than OC, GTX 560 is like 25% better than 460