A single anomaly in Metro 2033 appears as a pair of GeForce GTX 680s beat the GeForce GTX 660 Ti trio at 1920x1080. The game otherwise appears to favor the lower-cost three-way SLI solution.
Metro 2033’s integrated charting system does, however, show a slow spot around 35 seconds into the demo that, if replicated during gameplay, could definitely affect an otherwise smooth experience.
Metro 2033’s preference for three GeForce GTX 660 Tis grows at the Very High quality preset. Unfortunately, we’re forced to drop to 4800x900 to achieve smoother frame rates when the DirectCompute-based depth of field filter is enabled.
Even at 4800x900, a second-by-second analysis shows that two GeForce GTX 680 boards in SLI are somewhat more reliable.