Odpověď na názor

ale trpí, na webu najdeš dost příkladů, kdy tomu tak je i u single karet.. Bohužel převážně se týká AMD karet.

https://www.google.cz/search?q=single+card+stuttering&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:cs:official&client=firefox-a#client=firefox-a&rls=org.mozilla:cs%3Aofficial&sclient=psy-ab&q=single+GPU++stuttering&oq=single+GPU++stuttering&gs_l=serp.12..0i19j0i7i30i19.43300.46081.1.47411.5.5.0.0.0.0.152.483.4j1.5.0...0.0...1c.1.18.psy-ab.hWdf9xWiHJw&pbx=1&bav=on.2,or.r_qf.&bvm=bv.48340889,d.Yms&fp=95abfefc646869cb&biw=1280&bih=637

ještě k té nepřesnosti Frapsu:

"If you click through the different GPUs, several trends become apparent. Even though they're from different test runs, the Fraps and FCAT data for the single-GPU products tend to be quite similar. As we've seen before, there's a little more variability in the Fraps frame times, but the timing gets smoothed out by buffering by the time FCAT does its thing."

http://techreport.com/review/24703/amd-radeon-hd-7990-graphics-card-reviewed/3

Takže FCatem by nejspíš na Radeonu naměřili stejné výsledky jako s Frapsem...

a FRM dodávají:

"The GTX 690 isn't immune to microstuttering issues, either. A pronounced jitter shows up in its Fraps results, even though it's smoothed out by SLI frame metering before the frames reach the display. The impact of frame metering here is pretty remarkable, but it's not a cure-all. Frames are still being generated according to the game engine's timing. As I understand it, the vast majority of game engines tend to sample the time from a Windows timer and use that to decide how to advance their simulations. As a result, the content of frames generated unevenly would advance unevenly, even if the frames hit the display at more consistent intervals. The effect would likely be subtle, since the stakes here are tens of milliseconds, but it's still less than ideal."