Amazon.com: Gigabit Dual NIC with Intel 82576 Chip, 1Gb Network Card Compare to Intel E1G42ET NIC, 2 RJ45 Ports, PCI Express 2.1 X1, Ethernet Card with Low Profile for Windows/Windows Server/Linux :
INTEL 82546 Dual Port Gigabit PCI 32bit Network Server Adapter LAN card | eBay
Intel I225 Chips 4 Port 2.5G RJ45 Network adapter PCIe PCI Express quad port 100/
Best Buy: Intel Ethernet 10 Gigabit Converged Network Adapter X520-SR1
Amazon.com: 10Gb PCI-E NIC Network Card, Dual SFP+ Port, with Intel 82599EN Controller, PCI Express Ethernet LAN Adapter Support Windows Server/Linux/VMware, Compare to Intel X520-DA2(Intel E10G42BTDA) : Electronics
Ethernet Products: Network Cards and Network Adapters - Intel®