Rust low FPS

As you read the title I got terrible FPS at rust at some points that is. I get between 10-30 and I have no clue why as I can run games with better graphics with more FPS as well.

My specs:
Intel® Core™ i5-3570 CPU @ 3.40GHz
NVIDIA GeForce GTX 760
13 GB RAM
Windows 7 Ultimate
Power supply is suppose to be 500 watts from corsair.

Why is there no booooring rating…

Rust is an Early Access game with optimization being put on a low gas as there is a lot of content to be added.
FPS right now stinks but this will improve over time.