StarTech.com 4 Port Gigabit NIC PCIe Network Card - Quad Port Adapter (ST1000SPEX43) - network adapter - PCIe - Gigabit Ethernet x 4
Amazon.com: HINYSENO 4 Port RJ-45 10/100/1000Mbps PCI-Express x 4 Gigabit Ethernet Server Adapter Dual Port Network Interface Controller Card for I350AM4 Chipset HS-LGI350A-4BT : Electronics
Intel PRO/1000 PCI-E Quad Port ET Gigabit Ethernet NIC Server Adapter
PCIe x4 4 RJ45 Port Industrial Automatic Card - Wide Temperature Range