LAN connection issues

[neonnewitch]

Hello, new PC here w/ MSI B450 Tomahawk Max mobo. I'm trying to connect to the ethernet.

All using cat5e cable and they should be good (been switching between cables and they all give the same results). All drivers are up-to-date, I believe, I tried both the ones from Realtek website and the suggested ones on MSI website.

There's no power saving or anything similar on. PSU is Seasonic 650W 80+gold. My internet plan is for 1000M.

 

1. When I connect directly from the wall to my PC, it simply does not connect, and the connection flickers on and off. It can recognize something for like 2 seconds, and then it disappears for 2 seconds, and go on and on like this. When it's briefly on, the lights on the port is: left orange blinking, right green constant. But again, it usually only recognize it for 2 seconds, and it's all off again.

 

2. I tried to use a UBS port adapter, and it works! However, it caps at 100Mbps. The adapter supports gigabyte, and I have set the speed in both Auto and 1 Gbps full deplex in the driver setting, nothing changes. 

 

3. I have a extender/router from my network company, and when I try to use it (wall->router->usb adapter->pc) using the same cable, it shows that speed is at 1Gbps, but can't configure ip address. I think this is an issue with the company not my setting? At least here, it shows that with the current adapter and the cable, it is possible to reach 1Gbps.

 

Any help would be appreciated. If the issue is with my mobo, I'm ok with using the USB adapter for the time being, but I want to have the full speed. 

Thanks in advance.

[YSP]

Hello, did you manage to fix this issue? If so, how? I am having the exact same issue and am seeking help.