Yes it is as it is listed:
1 x PCI Express 3.0 x16
Just make sure you have a PSU to work with it (8 pin PCI-e power connector needed).
Will the two 6 pin adapter cable not work?
Depending on which GTX 760 you get, there is a 2 x 6 pin PCI-e power connector to 1 x 8 pin adapter (should be included in the box with the GTX 760). Image below: