X870E Nova Ethernet adapter disappears

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   Hello.

I have a problem with my Ethernet adapter on the X870E NOVA and am at a loss:

The error already occurred during the initial installation: No network card was found. After a few attempts, it suddenly worked and I thought it was just a problem with the setup.

But the problem is much more subtle:

The network card worked fine at first - for hours.

But as soon as the computer goes to sleep and is woken up again, the network card has disappeared. Even in the device manager. Sometimes even when I shut down the computer.

Only when the computer is shut down and disconnected from the power supply for at least one minute does the network card reappear and then work again. Depending on the powersave settings in the BIOS, I also have to unplug the network connector to get the Ethernet working again. 
The problem occurs on both my 1G switch and my 2.5G switch.

Bios, Windows and drivers are up to date. I have also tried various power saving settings in the BIOS without success.

Help!

X870E Nova WIFI
BBIOS 3.18.AS01
Ryzen 9950X
64GB RAM
Geforce RTX 3080

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Tommi_nrw Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 3 hours 41 minutes ago Location: Germany Status: Offline Points: 20	Post Options Post Reply Quote Tommi_nrw Report Post Thanks(0) Quote Reply Topic: X870E Nova Ethernet adapter disappears Posted: 2 hours 59 minutes ago at 12:05am
	Hello. I have a problem with my Ethernet adapter on the X870E NOVA and am at a loss: The error already occurred during the initial installation: No network card was found. After a few attempts, it suddenly worked and I thought it was just a problem with the setup. But the problem is much more subtle: The network card worked fine at first - for hours. But as soon as the computer goes to sleep and is woken up again, the network card has disappeared. Even in the device manager. Sometimes even when I shut down the computer. Only when the computer is shut down and disconnected from the power supply for at least one minute does the network card reappear and then work again. Depending on the powersave settings in the BIOS, I also have to unplug the network connector to get the Ethernet working again. The problem occurs on both my 1G switch and my 2.5G switch. Bios, Windows and drivers are up to date. I have also tried various power saving settings in the BIOS without success. Help! X870E Nova WIFI BBIOS 3.18.AS01 Ryzen 9950X 64GB RAM Geforce RTX 3080