I had to Laugh when I read Intel HD Graphics, must not be a techy, that doesnt even come into play with a Discrete card..
Anyhow
Your System speccs well exceed this game I would lean towards updating Drivers Nvidia, Realtek, and chipset driver from intel... Dont just update them remove old ones before installing new ones dont reply on the installer to do that correctly for the nVidia and realtek...
This laptop is relatively new and I'm almost positive everything is up to date, but I'll still check.
Edited:
Use the Nvidia panel to make sure Rust is using your discrete card and not the Intel HD.
Rust and Intel integrated graphics get along about as well as water beds and hedgehog cannons.
Do you mind elaborating on how to do this?