Slow WiFi connection speed on Surface Pro 4 or Surface Book

If you just bought a new Surface Pro 4 or Surface Book, but find that your WiFi connection speed is slow, then you might want to check if this solution is something that can fix your problem.

Slow WiFi connection speed on Surface

In an answer to a question on Microsoft Answers, a Microsoft Support Engineer has said:

We have a known issue with .41 that results in low throughput with specific access points. The issue is specific to MAC layer aggregation (AMSDU over AMPDU) and only impacts a small subset of access points. We are working on a fix for an upcoming update. Until the fix is available, please update the registry key setting to work around this issue.

The workaround suggested is as follows:

From the WinX Menu, Run regedit to open the Registry Editor:

Navigate to the following key:


Look for the key called TXAMSDU.

Double click or tap on it.

Now modify its value from 1 to 0.

Exit the Registry Editor and restart your device.

Let us know if this helped resolve your issue.

Related reads you might want to take a look at:

  1. Poor WiFi performance on Windows PC
  2. Increase WiFi Speed and Signal strength and coverage area.
  3. How to improve Wireless Network Signal on Windows 10/8/7.
Posted by on , in Category Windows with Tags
Anand Khanse is the Admin of, a 10-year Microsoft MVP Awardee in Windows (2006-16) & a Windows Insider MVP. Please read the entire post & the comments first, create a System Restore Point before making any changes to your system & be careful about any 3rd-party offers while installing freeware.


  1. Eli

    Tried it, I see no difference. Really disappointed with the surface pro 4 at this moment…

  2. Manuel Di Maio

    same problem no difference after change

  3. Steeve French

    No difference.

Leave a Reply

Your email address will not be published. Required fields are marked *

5 + 8 =