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Intel PCI-e Gigabit ethernet adapter card quad port RJ45:
$20.50
This is a quad gigabit Ethernet PCI-e computer expansion card. This is an Intel card as you can see in the pictures. I bought this and discovered that the computer I wanted to use this in has an older PCI slot and not the newer faster PCI-e style slot. My mistake could be your luck. Happy offerding and good luck.