Rust restarts my internet

[Squirrel1977]

Hi I’m trying to figure out if I should buy my own router, if it’s a computer problem or how I can fix it. I used to be able to run 2 or 3 devices playing rust but all of a sudden my internet resets if I try getting into a game of rust and won’t let me play. How can I fix this? My internet shows it should be at 800 mbps download and 30 mbps upload, my computer is water cooled with 48 gigs of ram, an i5 processor an old but decent graphics card. What could the issue be?