torok said:
|
Basically, multi-GPU setups can produce more frames, but they'll come out like this: 10ms, 10ms, 10ms, 50ms, 10ms, 10ms ...
And that gives a worse image quality to the viewer than the following: 12ms, 12ms, 12ms, 12ms, 12ms, 12ms. Even though the first card has higher FPS, the second card will look better to a human.
So the 99% measure shows in how long you can expect 99% of frames to be rendered, rather than the average. For smooth framerates, that comes out to the same thing as raw FPS. But if they're more like the first situation I said, it's a better measure of the experience.
Video of actual cards: http://techreport.com/review/24051/geforce-versus-radeon-captured-on-high-speed-video
Full explanation (long): http://techreport.com/review/21516/inside-the-second-a-new-look-at-game-benchmarking
More testing on it: http://www.pcper.com/reviews/Graphics-Cards/Frame-Rating-Dissected-Full-Details-Capture-based-Graphics-Performance-Tes-12
