Debian 10 Upload speed issue

I am using a small Lenovo i5 PC as a server. for some odd reason it's upload speed is capped at around 4.03 Mbit/s System: Debian GNU/Linux 10 (buster) x86_64 10E90002UK ThinkCentre M83 Kernel: 5.5.0-0.bpo.2-amd64 CPU: Intel i5-4590T (4) @ 3.000GHz Ethernet Card: (eno1) Ethernet Connection I217-LM Speed Test Result: Download: 923.60 Mbit/s Testing upload: 4.01 Mbit/s Raspberry Pi 3B+ on the same network has exactly the same issue. It's upload speed is caped at 4.03 Mbit/s I have two routers, with 1 gigabit ports support. Tried both. Same result. I have a Manjaro and another Debian 10 PC on the same network that do not have that problem. I am on a symmetrical 1 Gigabit connection and other machines can use it. I am suspecting Ethernet Card drivers. Any ideas?I217-LM UPDATE: downloading the driver for I217-LM from here and running sudo make install did build and install the driver but did not solve the issue.