BioShock Infinite
BioShock is fantastically playable and looks great on the PC. We benchmark a 45-second section near the start with all available eye-candy turned on.
Reasonable scaling at 4K for the EVGA duo. The single-card AMD Radeon R9 295X2, which in reality is the same as two slightly overclocked R9 290X GPUs on one card, also does very well here. Titan X would need some serious overclocking love to usurp the cheaper graphics setups.
Almost all of the frames within 25ms is always a good thing at 4K.
Dual-GPU rendering doesn't appear to suffer from performance-related foibles in BioShock: two GTX 970 OC cards work just fine.