TPU came across rumors that NVIDIA is delaying the availability of the GeForce GTX Titan-Z to beef up the card to better warrant its $3,000 price tag. The new model reportedly features a full 3-slot thick cooler, whereas the model shown at NVIDIA's GTC 2014 event had a 2.5-slot thick cooler. The improved cooling solution will reportedly allow faster clockspeeds to make the card more competitive versus AMD's Radeon R9 295X2.
There may have been a last-minute realization at Santa Clara, that the card - as presented at GTC - may not cut it in the ring against AMD's Radeon R9 295X2, or at least it won't be able to warrant its vulgar $3000 price tag, against the R9 295X2's $1500; despite AMD's rather messy three-piece approach to its liquid-cooled product (the card itself, a radiator, and coolant tubing), and so NVIDIA could be redesigning the GTX TITAN-Z with an even bigger cooler, to facilitate higher clock speeds.
The new launch date of this $3,000 card is unknown.