Ok Download / Slow upload

[PotatoVeggie 1]

Greetings!

Despite tweaking buffers, MTUs and other things, I am unable to get upload speeds above ~550+/-50 Mibps on a server that should have enough capacity for at least 10Gbit more. 

Is it possible to achieve 8-10Gbit upload speeds on servers that report available capacity for it? If yes, please share config changes that I need to make in order to fully utilize my connection. 

[Hypertext1071 7]

What application are you using the VPN with? Also, what is the max upload speed you can currently get? (Just curious I'm not sure if I will be able to help)