"Use Direct3D 11" Greyed Out

I’m running on a Windows 7 machine with a GTX 760 and i5 4670k. All the forums I have gone through have said that if it’s grayed out then you’re PC specs are not up to par, but I believe mine are perfectly good. I want to try out some of the new motion-blur/depth of field effects, so any help is accepted!

Randomly it worked, so yay.