I have a 660 (not TI version) and an i5 processor (factory overclocked variant) also 8gb ram and SSD. Though my resolution is 1920x1080. I also tend to zoom in and out on the battlefield all the time which taxes the frames per second considerably (30-ish on quality settings + big battle), zooming out I have no problems (50+ on quality). But as I said I'm kind of picky with my FPS, I'd prefer it to not go below 40 zoomed in and not be too jumpy, hence I use 'performance' settings until they hopefully optimize it a bit.