NVIDIA GeForce GTX 660 Ti SLI Performance Analysis
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Conclusion
Twin Titans
The NVIDIA GeForce GTX 660 Ti is a very enticing candidate for dual-GPU setups providing near to top-of-the-line performance at a much better price than other dual-Kepler GPU setups.
Performance scaling was best at the resolution of 2560 x 1600 pixels, with game quality settings turned up, the SLI pair cranking out between 80-105% more performance than the single card alone. At lower resolutions (full HD) and settings, we saw only a 20-50% increase in performance compared to the single card performance, and as such, we would only recommend the GTX 660 Ti SLI setup to gamers that really require the extra power, such as those running multi-display setups, those with huge, high-resolution monitors, or those planning on playing graphically demanding games at completely maxed out settings. Additionally, the added firepower will also come in handy if your're keen on running games in 3D using the GeForce 3D Vision glasses and transmitter.
In fact, for most gamers without such high demands, the actual tangible improvement with the SLI setup will go unnoticed. On many of our benchmarks, most notably the less demanding games and those run at 1920 x 1200 pixels resolution, the GTX 660 Ti SLI config was exceeding 100 FPS output, which is definitely an overkill in terms of actual user experience. Most people won't be able to tell the difference between 60 FPS and 120 FPS.
Having said that, if you do require (and appreciate) the extra horsepower, the GTX 660 Ti SLI setup does offer great value. At an SRP of US$598 for a pair of GTX 660 Ti cards, you're looking at a saving of US$200 against a pair of GTX 670s, with only an average 10-15% performance loss. If you compare two GTX 660 Ti cards against a single dual-GPU GTX 690, which retails for a whopping US$1000, or a pair of GTX 680 cards (which will cost you a similar US$998), you're looking at an even bigger savings of US$400, for only a 10-20% loss in performance.
All things considered, we think the NVIDIA GeForce GTX 660 Ti SLI combo will please a lot of users who can't afford to fork out a four-figure sum for the top-end GPUs, while enjoying most of their performance capabilities. Of course, nothing beats having the true horsepower of the top tier cards to handle any and all situations like 3-way SLI, triple-monitor gaming with 3D Vision capabilities, but if you're not going over the top, the GTX 660 Ti SLI would do fine for most enthusiasts.
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