Upload (from a client to RPi4 server): 528 Mbps.Download (from RPi4 server to a client): 2.05 Gbps.These were 90-second iperf3 tests with standard 1500-byte MTU and a single iperf3 stream. The maximum TCP throughput Raspberry Pi 4 iperf3 server can handle with a 5 Gbps USB 3.0 Ethernet adapter. At the time of writing, Linux kernel 5.10 is the Raspberry Pi OS gold standard, and that’s what I used for all tests. I researched USB 3.0 multigigabit NBASE-T Ethernet adapters, and purchased a few. So, the question is, can it support multigigabit speeds?Īlthough it does not have any PCI Express slot available, it does have a couple of USB 3.0 ports. Raspberry Pi 4 (RPi4) is widely available, and there is a chance that you might already own one. While the standard 1 Gbps adapters push around 950 Mbps of TCP traffic, the iperf3 server will sooner or later become a bottleneck for throughput measurements. With the first consumer Wi-Fi 6E routers already shipping, and enterprise access points being worked on, I think it is now time to up my iperf3 game.
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