1680 x 1050
I find recommended settings to be deceptive for any game. Take battlefield3 for example. They recommend a gtx 560. I had sli gtx's 460 1GB and I could only play with high settings and still maintain 60 FPS. SLI gtx 460 1GB are far better than a single 560. I believe the recommended video card for any game will only give you middle of the road performance and the minimum card will be barely enough to play at the lowest settings depending on the resolution. Having said that, if you have another pci-e x16 slot available you can get another 6770 and crossfire it and you should be able to max those games at your resolution. You may run into a power issue with your 550W. AMD recommends a 450W for a single 6770 and a 600W for crossfire 6770. A good 550W may be enough so if you decide to get another 6770 then try it with your 550W first and see if you need more. I find a cheap digital power meter is a handy device to see what your system draw is.