I've had issues on laptops before with receive side coalescing enabled. Disabling that (a PowerShell command on windows) significantly improved wifi performance. ________________________________ From: Karl Auer via Public <public@talk.mikrotik.com.au> Sent: Thursday, 11 December 2025 12:01 To: MikroTik Public Cc: Karl Auer Subject: [MT-AU Public] Bandwidth oddity/problem We have a 100% MikroTik network. When we run a speedtest while directly connected (Ethernet) to our gateway router, which is connected to the NBN on an FTTP service, we see expected results: Over 250 down, over 100 up. Three 10G fibre hops, a switch, a 1GB fibre hop and another switch later, those numbers are very slightly lower. All good. BUT: Connected via 5GHz wifi to an access point attached to the first of the abovementioned switches, we get the same download speeds, but only around 35 up. With essentially no other traffic on the wifi, the test device (a laptop) no more than three metres from the access point, and with no intervening objects. My thinking is this has to be a limitation in the test device's wifi or a limitation in the access point (MikroTik CAP aX). Not sure how to prove it one way or the other. We get the same result on three different laptops, but they are all similar vintage and same manufacturer (Lenovo). Is there any way this could be a *configuration* issue? It's very consistent. Am I ignorant of a known asymmetry in 5GHz wireless speeds? Hoping for ideas, K. -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Karl Auer (kauer@nullarbor.com.au, he/him) work +61 2 64957435 http://www.nullarbor.com.au mobile +61 428 957160 Please feel free to deal with this email during your own working hours. _______________________________________________ Public mailing list -- public@talk.mikrotik.com.au To unsubscribe send an email to public-leave@talk.mikrotik.com.au