To get these numbers I am using lan speedtest, and have run multiple tests with multiple packetsizes between devices on the network. I seem to get faster speeds with larger packet sizes. Source: 6 months ago

As far as stress testing i/o and network, I'm unsure, never had to test it. I've used Lan Speed Test by Totusoft to narrow down degraded network performance between devices on a LAN to a smaller area of troubleshooting. Https://totusoft.com/lanspeed. Source: about 1 year ago

How are you testing your connection? For internet speeds use speedtest.net I use https://totusoft.com/lanspeed to test speeds for my LAN. Source: over 1 year ago

After a quick search and a test, you can also use This program to test the speed between your computer and your LAN. This can help you to determine if the problem lies between your computer and the modem, or the modem to the internet. Source: over 1 year ago

A great way to test raw throughput and read/write speeds on your home network is to use Lan Speed Test: https://totusoft.com/lanspeed. Source: over 1 year ago

Get Netlimiter and you can limit Steam and anything else you want to use practically no bandwidth. Source: almost 3 years ago

On Windows, the classic tool to solve this problem is called NetLimiter, and it allows you to control bandwidth usage on a per-app basis. I used it back in my Win98 days and it was fantastic, and probably still is. Source: about 3 years ago