Re: Nvidia 260 GTX ot ATI HD 4870
microstutter happens most often with SLi or Crossfire setups, but can also happen with single card on some occasions. it is a slow down in video rendering caused by many different reasons. but it so brief that often doesn't show up on decrease in FPS. It is hard to explain. Good example would be if you are watching a movie, and every 20 or some frames, it skips 2-3 frames.
ATI cards have plenty off AA modes, but they are missing some of the most important modes, like Super-Sampling AA and Combined modes (Multi-Sampling and Super-Sampling)
Windows 8 the next big failure, right after Windows ME