Originally Posted by aSilva
what about the 650 ti boosts going for like 120$ now on newegg if they drop to 105$ putting them in sli will give better performance than 760's or even 670.. so worth it?
here's a good article about that
With the GeForce GTX 650 Ti Boost set to be one of the best value sub-$200 graphics cards, how well do they behave when going in SLI mode? With a total GPU bill of $340, the GTX 650 Ti Boost SLI cards are more expensive than a single Radeon HD 7950 ($300) or GeForce GTX 660 Ti ($280), while they are slightly cheaper than the GTX 670 ($370).
Against the Radeon HD 7950, the GTX 650 Ti Boost SLI setup was on average 26% faster in the frame per second testing. However, once we factored in frame time performance we found that the SLI cards were just 1% faster on average. This means the actual gameplay experience will be about the same with either setup, but the SLI will be more expensive.
You'd have a better experience with a single GPU OC'd than you would with two low/mid cards SLI'd.
A $250 7950/760 would be a better choice and would set you up for SLI/CFX in the future