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I am having a problem with my Cable modem connecting threw my NIC, The cable company has came out and tested, and it is not the modem. I have tried several NICs and none seem to work. I have an AMD KT7A-Raid motherboard. Do I need to install some specific new drivers, or maybe you could recommend a NIC that works. Thanks.

Hmmm. Did you pay for the service to be installed? Did they provide the NIC? If so, then they're responsible for making it connect, not you.
If you've got your own NIC, make sure you're getting link lights on both ends (NIC and modem). If you are, then it's likely that the modem has already allocated more than one MAC as assigned on the inside.
To rectify the MAC problem, you'll need to reset the modem to factory defaults, and then let it find the network again. It shouldn't be too hard, but may take up to a couple of hours to synch up correctly.
Get out your documentation, and bring up a browser. Go to the web page listed in the modem doc's, and see what it's assigned for MAC's. That should tell you whether or not you need to hard reset it.
The cable company will tell you never to reset the modem, but apart form the time it wastes finding the network again, it won't really hurt anything. I've done mine more than once, and done a few others, too. They all came back up after a couple hours (more or less).
HTH,
Chase

Oh, if you get the web interface for the modem, then you also know that your wiring is correct, and it's neither the NIC, wire, drivers or hardware.
Chase

Well.. I can use the cable modem through USB port, but it seems to overload and cuts me off. The only way to get back online is to reboot. When it is connected via NIC, the lights are working, and on the cable modem, the lights are the same as they are when it is hooked up via USB. Power, PC Link, Cable Connection and Activity all seem to be working when they're connected either way. But it only works when I use USB. And the company came out here after I was having problems, I picked up a self-install kit.

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USB to network adaptor
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Linksys Wireless Network ...
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