Name: EVGA GeForce GTX TITAN X Reference Graphics Card, 1GHz Core, 1075 MHz Boost Clock, 12GB GDDR5, PCI Express 3.0 x16, Dual Slot Space Required
Brand: EVGA
SKU: EV12GP42990K
Price: 1069.99 USD
Availability: Discontinued
Rating: 5 (1 reviews)

EVGA GeForce GTX TITAN X Reference Graphics Card, 1GHz Core, 1075 MHz Boost Clock, 12GB GDDR5, PCI Express 3.0 x16, Dual Slot Space Required

EVGA GTX TITAN X

EVGA

EVGA GeForce GTX TITAN X Reference Graphics Card

Adorama

Computers

Computer Components

Motherboard Interfaces

EVGA Motherboard Interfaces

EVGA GTX TITAN X 

Top Rated Gear: EVGA GeForce GTX TITAN X Reference Graphics Card, 1GHz Core, 1075 MHz Boost Clock, 12GB GDDR5, PCI Express 3.0 x16, Dual Slot Space Required Expansion Ports: DisplayPort, DVI, HDMI, Internal Interface: PCIe, Series Compatibility: PCIe

I first bought  12G-P4-1999-KR (hybrid version of this card). Unfortunately, it didn't fit into HP Z840 workstation. This card fit fine. 
Great Card!