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Performance Summary Charts

Here is a table with the full test results:

The first pair of our summary charts shows you the scalability of our 2-way SLI configuration in comparison with the single GeForce GTX 660 Ti, the latter serving as a baseline.

So, we can see performance benefits in most of our tests with the exception of the CPU-dependent Lost Planet 2, the AA-less mode of Hard Reset, and the new F1 2012. The two GTX 660 Ti cards are an average 60-80% faster than the single such card at 1920x1080 and 69-82% faster at 2560x1440. The scalability is higher when antialiasing is turned on. We can also add that the GeForce GTX 660 Ti tandem is generally faster than the single overclocked GeForce GTX 680, but more expensive, too.

The second pair of charts helps you evaluate the effect from adding the third card to the 2-way SLI.

It is only in Nexuiz at 2560x1440 that the 3-way GeForce GTX 660 Ti configuration shows its very best. In the rest of the games and benchmarks its scalability is less impressive than that of the 2-way SLI. The average scalability is 22-34% at 1920x1080 and 33-46% at 2560x1440. SLI technology is the least efficient in Lost Planet 2, Hard Reset, Borderlands 2 and F1 2012.

Finally, let’s compare the 3-way GeForce GTX 660 Ti SLI configuration with the dual-processor GeForce GTX 690 card, the latter serving as a baseline in the charts:

The 3-way SLI is a little faster than its opponent in most of our tests. It is only in Hard Reset, Borderlands 2, F1 2012, and certain test modes of Total War: Shogun 2, Sleeping Dogs and S.T.A.L.K.E.R.: Call of Pripyat, that the GeForce GTX 690 is preferable in terms of average frame rate.

 
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