Amazon.com: EDUP Gigabit Ethernet PCI Express PCI-E Network Card 10/100/1000Mbps RJ45 LAN Adapter Converter for Desktop PC : Electronics
Intel 1GB Single Port PCIe Network card (half height) | Dell USA
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3Pt PCIe USB 3.0 Card + Gigabit Ethernet - USB 3.0 Cards | StarTech.com
Intellinet Gigabit PCI Express Network Card (522533) – Intellinet Europe
Sonnet 1-Port Solo 10G Ethernet PCI Express 3.0 Card G10E-1-XE3
Amazon.com: CERRXIAN Gigabit Ethernet PCI Express 1x Slot PCI-E Network Card 10 / 100 / 1000Mbps with Low Profile Bracket for Desktop PC : Electronics
StarTech.com 1 Port PCIe Gigabit PCIe Network Card - NIC Adapter - ST1000SPEX2 - Ethernet Adapters - CDW.com
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OWC 10G Ethernet PCIe Network Adapter Expansion Card at MacSales.com