VrZone posted a performance-preview of the GeForce GTX 680 in 2-way SLI configuration. A set of two GTX 680 cards were put through 3DMark 11 in Entry, Performance, and eXtreme presets.
The cards were clocked at 1150 MHz core, and 1803 MHz (7.20 GHz effective) memory.
In the Entry preset of the benchmark GTX 680 2-way SLI scored E22878; it scored P16860 in Performance preset; and X6243 in eXtreme. 2-way SLI of GTX 680 should be fit for 2560x1440/1600 resolution gaming. The rest of the test-bench consisted of Intel Core i7-3930K six-core processor clocked at 5.00 GHz, with 16 GB of quad-channel DDR3-2133 MHz memory, and ASUS ROG Rampage IV Extreme motherboard.