I've tested the onboard LAN port (rated as 10/100 Fast Ethernet, and driven through the onboard USB 2.0 bus), and a few different 802.11n WiFi cards, and the raw throughput speeds ranged from ~45 Mbps with the 802.11n cards (with a very strong signal) to ~94 Mbps with the onboard LAN. If you're taxing the CPU and USB device bandwidth on the new USB 3.0 ports, you might not get consistent Gbps-range performance, but in my testing so far, the Pi 4 can sustain over 900 Mbps (// I received a shipment of some Raspberry Pi 2 model B computers for a project I'm working on (more on that to come!), and as part of my project, I've been performing a ton of benchmarks on every aspect of the 2, B+, and A+ Pis I have on hand-CPU, disk (microSD), external SSD, external HDD, memory, and networking. Note about model 4: The Raspberry Pi 4 model B finally has true Gigabit wired LAN, owing to it's new I/O architecture. So if you have a 3 B+, there's no need to buy an external USB Gigabit adapter if you want to max out the wired networking speed! Note about model 3 B+: The Raspberry Pi 3 model B+ includes a Gigabit wired LAN adapter onboard-though it's still hampered by the USB 2.0 bus speed (so in real world use you get ~224 Mbps instead of ~950 Mbps). It’s also the perfect travel companion for any laptop or tablet due to its small size and USB bus powered design.Tl dr You can get Gigabit networking working on any current Raspberry Pi (A+, B+, Pi 2 model B, Pi 3 model B), and you can increase the throughput to at least 300+ Mbps (up from the standard 100 Mbps connection via built-in Ethernet). The Pluggable USB 2.0 10/100/1000 Gigabit Ethernet Adapter is an easy way to gain wired gigabit network speeds over USB 2.0 for faster HD video streaming, gaming, web browsing, network storage, and more. Excellent Standby for laptop without an Ethernet socket when wireless fails. Portable USB to Network Adapter: This lightweight USB 2.0 to network adapter is a perfect accessory for adding a standard RJ45 port to your Ultrabook, notebook, or desktop for file transferring, video conferencing, gaming, and HD video streaming.
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