LAN Internet disconnects when downloading

Posted by RustJigsaw@reddit | buildapc | View on Reddit | 17 comments

Finished building a new PC about a month ago, To connect to the internet, I use a cat 7 cable directly connected to the router. My motherboard is the X570-E II which has an Intel 1GbE and a Realtek 2.5GbE port and both of them have the same issue. When I download a file with a large filesize, or the download speed is really fast, the connection breaks and I have to either re-plug the cable from the router or use the Windows 10 built in troubleshooter, which states the default gateway is not available. Afterwards, everything works fine until i try to download something too big or fast.

The troubleshooting steps I have taken:

None of the above have solved the problem. Does anyone have any advice or know whats going on?