Slow WiFi connection speed on Surface Pro 4 or Surface Book

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If you have just purchased a new Surface Pro 4 or Surface Book, but your WiFi connection speed is slow, you may want to check if this solution can solve your problem.

In response to a question about Microsoft’s responses, a Microsoft support engineer said :

We have a known problem with.41 that results in low throughput at some access points. The problem is specific to MAC layer aggregation (AMSDU via AMPDU) and affects only a small subset of access points. We are working on a patch for an upcoming update. Until the update is available, please update the registry key to get around this problem.

The proposed workaround is as follows:

Start regedit from the WinX menu to open the registry editor :

Navigate to the next button :


Locate key TXAMSDU.

Double-click or tap.

Change its value from 1 to 0

Exit the registry editor and restart your device.

Let us know if it helped solve your problem.

Related documentation to watch:

  1. Low WiFi performance on a Windows PC
  2. Increase WiFi speed and signal strength and coverage.
  3. How to improve the wireless network signal under Windows 10/8/7.

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