@iht1982 

Hi, welcome to our community.

Here are some suggestions for your reference:

1. Check Cable and Port:
Ensure that the Ethernet cable is properly connected to both the 3468 card and the router.
Try using a different short Ethernet cable or port on the router to rule out a faulty cable or port.
2. Network Adapter Settings:
Go to Device Manager and locate your 3468 network card.
Right-click on it and select Properties. Under the Advanced tab, check the speed and duplex settings. Ensure it's set to Auto-Negotiation.
3. Network Configuration:
Open Network Connections (you can search for it in the Start menu).
Right-click on your 3468 network connection and select Properties. Ensure that the protocol (usually Internet Protocol Version 4) is enabled.
4. Disable Integrated Card:
Make sure the old integrated network card is completely disabled in BIOS, not just in Windows. Sometimes, disabling it in Windows alone does not stop it from interfering.
5. Check Windows Settings:
Go to Settings > Network & Internet > Status and click on Network Reset. This will reinstall your network adapters.
6. Test Different Device:
If possible, try the 3468 card in another computer to see if the issue persists. This can help determine if it's a hardware issue with the card itself.
7. Check for Conflicts:
Ensure there are no IP address conflicts in your network. You might want to set a static IP address for testing purposes.
8. Reinstall the Card:
Sometimes replugging the card can help. Turn off your computer, remove the card, and insert it again securely.

Thank you and best regards.