Nope, SLI has better frametime latency than single card, haven't you heard? Just view the benchmarks of Titan at tomshardware. SLI is what you get when you want to AVOID microstutter. 690 is better than Titan, period.
Titan has worse 95 percentile frametime latency than 690. Terrible. SLI = no microstutter. Everything you've been told or is even logical is wrong, frametimes are the ultimate metric of performance and SLI wins bigtime. Oh, please don't question frametimes, we've read a gabillion posts from the undercover nvidia PR crew about how great and perfect it is. Therefore, we have learned that there is absolutely no reason to get Titan over SLI.
So even Titan has worse latency than 690. The reasons for getting Titan at the same price as a 690 or 680 SLI are as follows:
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