I always play with VSYNC enabled, and frame rates locked to 60Hz. If you worked with interlaced movies, bad field order, converting material from NTSC to PAL, then you know what stuttering is. Monitors cant delay pictures 1 or 2 msec, they work with 20 ms or 16,666 msec timebase. The only way to see 1-2 msec stutter is, if the game engine is crap, and cant properly track its internal timer to render the frames properly, or uses RDTSC instructions for timing from 2-3-4 different cores. So, i think the SLI/CF technology is satisfactory so far, only the GAMES are very poorly ported/written.