First of all lets talk about prices. Let's consider that the two GTX 760 DirectCU II OC together cost 418 Euro. Compare that to the 563 Euro you'd have to pay for the cheapest reference GTX 780 Ti we can find. Therefore this one high-end card is significantly more expensive than the two mid-range models.
To dive a bit deeper into the results, we start with performance differences in 3DMark graphics score where we see that the SLI of two GTX 760 is 14 percent faster than the GTX 780 Ti. In the next theoretical test we ran, Unigine Heaven, we see that the two 760's are on average 14 percent quicker than the GTX 780 Ti. In case of games it turns out the for example in The Elder Scrolls: Skyrim the GTX 780 Ti is about 3 percent quicker than the two smaller cards in SLI. A closer look at Call of Duty: Black Ops 2 shows the other end of the scale, where the two GTX 760 score 31 percent better than the single GTX 780 Ti. Overall it is interesting to see that the GTX 780 Ti is quicker in highly demanding games. Once again the reason lies within the amount of graphics memory, since the VRAM of the two small cards is just too small for games with huge textures or for ultra high resolutions.
Overall the two GTX 760 cards are performing really well and there is no doubt the two of them are seriously quick. But in case of the particular models we tested, the graphics memory is too small for the performance delivered, there will be the usual SLI issues, although NVIDIA is taking quite good care of that and last but no least there is the power consumption which is 43 percent higher than with one single GTX 780 Ti. If you're actually thinking about buying two GTX 760's make sure you go for models with 4 Gigabyte VRAM otherwise the GTX 780 Ti will be quicker playing games at ultra high resolutions. When it comes to price/performance, than the two GTX 760 in SLI are simply great. Since drivers are meanwhile quite well optimized for SLI, almost any new game is supported with well balanced profiles.
