Will the 1080Ti fit inside the NZXT S340 elite case?

Solution
The graphics card is 279mm. The case supports upwards of 364mm graphics card. So the answer is yes. You can even fit a radiator in between.
Are you referring to the Lightning Z here: https://us.msi.com/Graphics-card/GeForce-GTX-1080-Ti-LIGHTNING-Z.html#hero-specification? I know they had a Gaming Z for the 1080 but don't see one listed for the Ti, only a lightning Z. The card in the link is 320mm long and your case list support a 334mm gpu with when using a front mount radiator and 364mm without a radiator.