I just picked up a system on craigslist for 150 dollars it came with among other things (a 4 core AMD 3.0ghz processor) a 9600gt. The cards seems okay, but I was wondering if upgrading to a 6770 would be worth it. I really don't play much more then Counter Strike Source which runs at max 60fps with vsync without skipping frame, but I just wonder if a 6770 could do more for me.