integrated LAN no longer works

I purchased a new gigabyte ga m790x-ud4p and everything was working great until i flipped it on one day and no internet. device manager shows no recognized NIC and it doesnt appear to be showing any connection to my router. i pinged my loopback and recieved successful replies. im hoping theres no hardware failure as with crossfire there really isnt that much room for a NIC that isnt integrated. im using Windows 7 build 7100 RC. The drivers available online are for vista 64 bit (im using 7 64bit) and i cant install them because the port isnt recognized watsoever :(

help is veerrryy appreciatedd :(

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