The 6770 can handle 720p (1280x720) pretty well, so 1024x768 shouldn't be a problem. There are faster cards that the FX-4100 can usually handle just fine, but I don't know if the games that you play can have their settings go high enough to make use of faster cards at such a low resolution.
Are you building a new computer and if so, what is your budget? Maybe I (or also some other people) can help.
I have already built the computer and i have OC'ed the 4100 to a pretty stable 4.0 ghz WITH the stock cooler and the temp doesnt go above 50c when gaming. My current gpu is a radeon 5450 which is awful
The games I play can be played up to a maximum of 1080p but i think my monitor is 720p. Also, my budget is around £120 for a graphics card as thats around what i payed for my cpu so im trying to avoid a bottleneck.
Thanks for any suggestions