So I have a home server with a quad gigabit network card. And it is hooked to a gigabit switch. I've tested it from a rig with a gigabit port and got 1gb/s copy speeds. Today I installed another quad gigabit card into my gaming rig hoping to get 4gb/s copy speeds. But I'm only getting 400mb/s.
I've checked drivers, I've checked anything in bios. Nothing is adding up to why I'm not getting 4gb/s. And the switch I have lights up green for 1000mb/s and yellow for 100mb/s. So it isnt getting a gigabit connection. Please help.
Card is: Intel Gigabit ET Quad Port server adapter.
I have same card in my server running windows 10. And no issues. Only different is my server is a amd threadripper and this is an intel.