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PCIe to 4-Port Gigabit Ethernet Adapter Realtek RTL8111 Chipset | ZimaBoard Official Store
PCIe x4 4 RJ45 Port Industrial Automatic Card - Wide Temperature Range
StarTech.com 4-Port PCI Express Gigabit Network Adapter Card - Quad-Port PCIe Gigabit NIC - Add four Gigabit Ethernet ports to a client, server or workstation through one PCI Express slot - 4-Port