I would say that you are likely being held back a bit. try scaling back the resolution, if the fps does not significantly improve, then you are being bottlenecked by your cpu. Beyong a "bottleneck" in some games that like fast quads you will definatley held back with respect to performance. I would oc that cpu a bit and see if your fps improve at all, if it does than your cpu is likely holding you back.
I would say that the 5770 is not worth buying at this point unless you are really strapped for cash (regardless of a small bottleneck) go for a 6850/gtx 460 imo that is the best buy for your res right now, and your could carry your gpu into a new build down the road...
huh im no friggin euro, im American dammit, never said he couldn't oc the cpu, unless you werent referring to me, but either way yeah he can easily oc the processor and get a mid level gpu and he will be good to go, whats the beef?
huh im confused bro and frankly don't care... the op needs to oc and get a new gpu what else is there to discuss, I'm 28 years old if it makes a difference to you but I dont kow what your talking about, besides you are the one who called me a "euro" so drop it/