Windows 10 limits Gigabit NIC to 250 megabits per second.
Windows 10 limits Gigabit NIC to 250 megabits per second.
My motherboard is an MSI B350M Mortar. The Ethernet IC is a Realtek 8111H. I’m certain this port once handled gigabit speeds on Windows 10. I started with a Ubuntu live CD and tested iperf3 against my NAS, achieving nearly gigabit transfers. When I ran iperf3 on Windows 10, the connection was limited to about 250 mbit. This suggests a possible Windows 10 update issue. Any advice would be really helpful. Thanks.
There are problems with that specific chipset in both Windows and some Linux distributions, though less frequently. I suggest using a dedicated Ethernet card with a solid controller. Intel models are reliable even with default drivers and work seamlessly in Linux. You might also consider swapping the cable—Linux can be more sensitive to poor connections and won’t compensate for missing data during testing. The only sure way is to move files directly. Windows generally performs better in this scenario. The Realtek NIC may still be underperforming, so downloading its driver could improve speed slightly. You can find the official download here. Also, update your AMD chipset driver from their site to eliminate other potential issues. Good luck!