Freeze problem

I cant plat Rust since I’ve got my new laptop. The Game freeze for some second at irregular intervals. This just happen on Game, even if I don’t move at all, not happen in the game menu.

I tried different servers, detail level, sugested lauch parameters, reinstalling Rust, rolling back to 331.93 Nvidia driver, nothing work so far…

My specs:
Win8 64b
MSI Dragon edition 2
GeForce GTX 780M.
i7 4700MQ. 2.40GHz
16Gb RAM

The most upsetting thing is I started playing Rust in a bussines Dell laptop and even not smooth at lowest level, I could play without this intermitent freeze.

Any idea?

Thank you