I've just a single Titan X and absolutely love it, it's freakin' ridiculously fast - but four of them in tandem? Be still my beating heart.
Legendary overclocker Vince "K|ngp|n" Lucido has set a new 3DMark FireStrike Extreme record, with 40,115 points - making K|ngp|n the first person in the world to reach over 40,000 points. It wasn't an easy task, but K|ngp|n had some of the fastest hardware on the planet helping him, and the same stuff that ended up damaging the T-1000 in Terminator 2: liquid nitrogen.
K|ngp|n used four of NVIDIA's new Pascal-based Titan X graphics cards, with the GPUs clocked at 2.2GHz, with them installed into an EVGA X99 FTW K motherboard and an Intel Core i7-6950X processor at a huge 5227MHz, all cooled with LN2. 32GB of G.Skill DDR4 RAM was used, with EVGA's SuperNova NEX 1600W power supply keeping everything running.