One interesting piece of news about the NVIDIA TITAN V is that this card does not support SLI. TechPowerUp got in touch with NVIDIA and got to hear that this card does not offer NVLink nor SLI compatibility.
The NVLink fingers on the TITAN V card are rudiments of the functional NVLink interface found on the Tesla V100 PCIe, being developed by NVIDIA, as the TITAN V, Tesla V100, and a future Quadro GV100 share a common PCB. The NVLink fingers on the TITAN V are concealed by the base-plate of the cooler on one side, and the card's back-plate on the other; so the female connectors of NVLink bridge cables can't be plugged in.
The TITAN V is a $2,999 card aimed at data scientists and we don't know if the lack of SLI will extend to NVIDIA's future consumer gaming lineup. One thing is for sure, both NVIDIA and AMD have de-emphasized multi-GPU support over the last couple of years. It's a technology that never really gained mainstream traction. Few gamers have the money or need for more than one GPU in their gaming rig, and the technology usually suffered from performance scaling issues in a lot of games.