Hardware Secrets posted GeForce GTX TITAN X Video Card Review
A quote from the article:
Launched last month, the GeForce GTX TITAN X is the fourth video card from the TITAN high-end video card series from NVIDIA, and the first one to support DirectX 12 (actually, DirectX 12.1), promising to be the fastest single-GPU video card to date. With superlative specifications, such as 12 GiB of memory, let's see how well it performs in games using UHD 4K resolution, compared to the GeForce GTX 980.GeForce GTX TITAN X Video Card Review @ Hardware Secrets