Hú de nagyon tévedesz: a memóriabusz szélessége nagyon nem üres szám. Bevágom a konklúziót a tomshardware.com egyik tesztjéből:

"Our last few comments concern the 660 Ti's 192-bit memory interface. Our benchmarks show that this can really put Nvidia's GeForce GTX 660 Ti at a disadvantage, even at 1920x1080 and without obscene texture detail settings. Whether or not you run into a performance problem depends mostly on the game you're playing. In general, though, the card really starts to run out of steam at anti-aliasing settings at and beyond 4x MSAA. This is too bad, since the GPU goes underutilized at that point. The problem is unique to this card. None of the other Kepler-based boards experience it. We're not saying the GeForce GTX 660 Ti is a bad card, but there are competing configurations that demonstrate better balance."