Why is Minecraft not smooth?

I recently updated my graphics card to allow for higher FPS when playing visually demanding games. Everything runs well- Battlefield 4, Titanfall, Diablo III etc- though when I play Minecraft there's another story.

I get reasonable frames depending what I set the cap at but when i run or spin quickly the frames can drop from 120 or so to less than 40 in a flash, and then once I stop moving it shoots back up.

Specs- 8GB RAM (Type unknown)
CPU- 3.4 GHz i7
GPU- Asus Geforce GTX 760 2GB

Not sure what the problem is as I'm above the required specs for Minecraft (I think)
Any help appreciated!

Minecraft is poorly optimized as it is written in Java. There's not much you can do other than install optifine or something. My PC can easily run all of the games like Titanfall and BF4, but still gets lower frames in Minecraft.

Sadly monecraft is like that use some mod like optifine