Amazon.com: 2.5GBase-T PCIe Network Adapter RTL8125B 2500/1000/100Mbps PCI Express Gigabit Ethernet Card RJ45 LAN Controller Support PXE for Windows/Linux/MAC with Low Profile : Electronics
Realtek PCIe GbE Family Controller stuck at 100mbps : r/pcmasterrace
Amazon.com: Realtek Chipset Gigabit PCI Express Ethernet Network Interface Card with Low Profile Bracket (No Software)) : Electronics
Realtek RTL8125 2.5Gbps LAN card with low power consumption
Realtek 8125 3000Mbps 2.5Gbps RJ-45 PCI-E Network Interface Card with Half Size Bracket for Small Form Factor Computers - Newegg.com
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Amazon.com: VOGZONE 2.5Gb PCIe Network Adapter Realtek RTL8125B, 2500/1000/100Mbps Gigabit Ethernet Card RJ45 LAN Port for Gaming/Office, Wake on LAN, Support PXE for Windows/Linux/MAC : Electronics
Note: Multiple VLAN Operation on Realtek RTL8111D NIC (& Others) | Gough's Tech Zone
Realtek Develops New Onboard LAN Chip to Win Back Gamer Crowd | TechPowerUp
Unveiling the Capabilities of Realtek PCIe GBE Family Controller: Does it Support Wireless Networking?