My A7N8X-E Deluxe MOBO has 2 Ethernet ports - a 10-100, which works perfectly, and a GIGABIT port supported by A Marvell NIC chip which has never been recognized during hardware detection and doesn't even register in the Device Manager panel. I have tried the enable jumper on the MOBO in both positions, just in case they got it wrong in the book, but to no avail. I installed the Yukon miniport driver that came with the MOBO and got an OK that the installation was successful - but that had no effect on anything. Any suggestions, or do I just have a faulty NIC chip? All suggestions gratefully received - especially one that works!