Thank you all...But i can't go past 3.33ghz coz of mobo restrictions and cooling issues.I am currently playing syndicate at constant 60fps on this rig(5670) but i don't feel any slow downs..How do you all "FEEL" bottleneck .Sorry maybe ques is noob but..
hd 6850 will be ok with your cpu no need to get worry it will botlleneck little bit in games such as syrim which uses cpu more then gpu btw you will be fine and all games will run fine just make sure that you have a good psu of 450w with 1 pcie connector.
With your CPU overclocked as it is you'll be fine, but your monitor resolution is pretty low. If you have no intention of upgrading it or the CPU any time soon you might want to consider an HD 6770 or GTX 550 Ti (and save the money). At your resolution you really don't need better.