My provider offers 500mb upload and download speed via glass fiber and I'm running windows 10.
a. This is working fine (350mb up and down) but only when I boot in safety mode with ethernet set to on.
b. Via normal mode and the cable, I have a peak of 350mb for a second then it drops down to between 75 to 85 MB download and only a 10mb upload all the time.
c. Via normal mode and wifi, I get a 80mb download and 45mb upload (and no peak).
Yep, my wifi seems faster than my cable connection.
I'm the only device connected to the router and it doesn't change anything when I turn my firewall and anti-virus off. It occurs with and without my battery connected, so that's not it.
I called Dell support but they don't have a clue.