Question Strange bandwidth usage on single game

[Mr. Pettit]

Sorry if I should post this in networking but I figured I'd ask here first. So I've been having an issue for about a year or possibly less when it comes to playing multiplayer servers on Garry's Mod. As far as I can tell no other game has this issue, but when I join a server in Gmod my network's bandwidth drops from about 460 Mb/s to about 60-70 Mb/s. Any other game typically only uses about 10 give or take, and it appears that my entire network is affected, not just my computer.

I'm on an ethernet connection as well and it appears to still be happening on WiFi. I've tried disabling downloads while playing games on Steam, as well as reducing the server browser pings/minute from 5,000 to 1,000. I also tried using a VPN, which seems to have little to no benefit. I can't seem to find any documentation on people having similar issues either, it's just really odd to me that it would affect one specific game and no other that I've tried so far. Looking in task manager, my network usage is only a couple megabytes at most when I'm in a server, so I'm not entirely sure where the bandwidth is going. Any help would be greatly appreciated.

(Additional information if it helps: My ISP is spectrum and I'm using a 3rd party Asus router and Arris surfboard modem. My PC is on an ethernet connection and running Windows 10)

 

[Ralston18]

What models for modem and router?

Run "ipconfig /all" (without quotes) via the Command Prompt. You should be able to copy and paste the full results here without needed to retype everything.

You do not need to redact IP addresses or macs. Do redact personal names and do not reveal the Public IP address assigned to the router via your ISP. ("What is my IP" will tell you what that IP address is if you do not know or recognize the IP address.)

Again do not post your Public IP address.

= = = =

Take a look in Resource Monitor and Process Explorer (Microsoft, free).

Either one or both tools (use one at a time) may reveal something else running in the background: maybe trying to update, backup, or simply "phone home".

Process Explorer:

https://learn.microsoft.com/en-us/sysinternals/downloads/process-explorer

I would look for anything that appears whenever Gmod or something else related to it is running.

Could be being triggered via Task Scheduler.....

Take your time looking, there is no need to rush.

There may also be some clues via the router's logs if available and enabled. Who has full admin rights to the router? You will need help from that person.