The number from iperf3 does show big difference between Windows 10 and Linux.
Use speedtest.net to measure the speed, the gap is mainly on the upload speed. Ubuntu w/ Linux v4.14-rc4, latest linux-firmware.git, cubic [1]: Ping: 5 ms Download: 82.29 Mbps Upload: 59.94 Mbps bbr [2]: Ping: 4 ms Download: 83.51 Mbps Upload: 54.92 Mbps Windows 10 [3]: Ping: 3ms Download: 84.08 Mbps Upload: 76.56 Mbps [1]: http://beta.speedtest.net/result/6699920423 [2]: http://beta.speedtest.net/result/6699960328 [3]: http://beta.speedtest.net/result/6699924242 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1670041 Title: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs