10Gb Ethernet from an M.2 slot! A neat upgrade for £71 - OC3D
OWC 10G Ethernet PCIe Network Adapter
NICGIGA 10G Base-T PCI-e Network Card, Marvell AQtion AQC113C Controller, 10Gb Ethernet Adapter, 10Gbe RJ45 Port NIC Card, Windows10/11/Windows Server : Amazon.co.uk: Computers & Accessories
Amazon.com: 10Gtek 10Gb PCI-E NIC Network Card, Single SFP+ Port, with Intel 82599EN Controller, Ethernet LAN Adapter Support Windows Server/Linux/VMware, Compare to Intel X520-DA1(Intel E10G42BTDA) : Electronics
CX4 10Gb Ethernet Câble SFF-8470 3m - Cablematic
10Gb Ethernet NIC with Intel 82599ES Controller, 10G PCI-E Network Card Compare to Intel X520-DA2 Converged Network Adapter, Dual SFP+ Ports, PCI Express X8 - Newegg.ca
LR-LINK 4-port 10G Copper Ethernet Network Adapter With Intel Controller