Marvel-based 10Gb switches like D'LINK. It seems you can always support 7-8 Gbps in and around 2.5-2.8 Gbps out. I figured before changing NICs or switches I'd try that now since 10Gbase-T SFP adapters are reasonable. Well it worked, now I can support 10.5-11.1 Gbps both ways. This matches what I get when I connect the Intel x550 and x540 directly to 10GBase-T with a 25ft CAT7 cable. It's much easier than destroying infrastructure! I have used Poleax 10GB SFP 10GB SR transceivers extensively and they have proven to be reliable. Of course, it's nice if you just plug and forget, and the data crunches on!
MikroTik S+RJ10 Ethernet Transceiver
10 Review
π‘ CM19A R.F. PC Transceiver for X10 Devices
8 Review
10GBase-T SFP+ Transceivers, 10G Copper RJ-45 SFP+ CAT.6a, up to 30 meters, π Cisco SFP-10G-T-S Compatible, Ubiquiti UniFi UF-RJ45-10G Supported, Fortinet, Netgear, D-Link, Supermicro (Pack of 2)
9 Review
π‘ Izokee ESP-01 Serial WiFi Transceiver Module with USB Converter, Compatible with Arduino
8 Review
UGREEN USB 3.0 Ethernet Adapter Hub with RJ45: Fast Gigabit Ethernet Converter, 3 Ports USB 3.0 Hub Compatible for MacBook, iMac, Surface Pro, Chromebook, Laptop, PC
11 Review
π CERRXIAN RS232 to Ethernet Serial Device Server - TCP/IP Converter with 1Port DB9 RS232 Serial to Ethernet Connectivity
3 Review
π uni USB C Hub with Ethernet Adapter, 4K HDMI, Gigabit Ethernet, and 3 USB 3.0 Ports for MacBook Pro, iPad Pro, XPS
11 Review
π StarTech.com NETRS2321P: 1-Port RS232 to Ethernet IP Converter, Serial over IP Device Server - Black
5 Review