Kepler Nvidia GeForce GTX 780

[boxleitnerb]

Microstuttering happens because of the minuscule differences in frame load times between the two gpus, it has nothing to do with overall FPS. This occurs with any 2-card setup (including AMD); the reason why it's better with the addition of an extra card is because the frame offset becomes smaller when you add a third party to fill in potential gaps.

First, FPS play a role: With high fps you are usually rather CPU bottlenecked, and then the offset slowly vanishes as the CPU dictates the frequency of the displayed frames and both GPUs have to wait in an even pattern. With low fps, most of the time there is a GPU bottleneck. The "deeper" this bottleneck is, the worse the problem with microstuttering.

Second, has it ever been proven that without a CPU bottleneck additional GPUs lessen microstuttering? By proven I mean frametime measurements for at least 5 games, no CPU bottleneck, data for both CF and SLI and complete disclosure of GPU and CPU load and graphic settings.