pato the link speed is 10Gbps as it should be. I’m using a 10Gbps ethernet card https://www.asus.com/networking-iot-servers/wired-networking/all-series/xg-c100c/ that I plug in directly via cat6a cable into the 10gbps port on the modem.
The testing part is a bit tricky and you are correct, there’s not that many servers capable of providing such speeds. I was able to reach 5.5Gbps download and 6Gbps upload using speedtest.net, but it’s not really indicative of real world behavior and is more of a burst speed indicator.
The way how I decided to test it was to queue up large Steam, Epic Games, etc. game downloads at the same time and try to saturate the 10Gbit channel this way. What I noticed it is when the combined traffic load from all downloads goes over 2Gbps for a sustained amount of time (longer than 10 minutes), the modem really heats up and then it starts thermal throttling, which in turn causes the network connection between the PC and modem to become unstable.
I will try out Daniele’s suggestion and test it with a cat6e or cat7 cable to rule out any cable related issues.
