Asus USB-AC56 wifi dongle tweaks

Soldato
Joined
18 Oct 2002
Posts
6,251
Location
EGBB
I have been using this dongle for the last few months in Win 10 and find that it loves to disconnect/reconnect, randomly drop out, switch from 5 Ghz to 2.4 Ghz etc. So I started looking for some tweaks and found some excellent ones that have made it very stable indeed, I thought they might be useful to someone on here.

My Setup:

  • Router: Asus RT-AC66U 1750
  • Dongle: Asus USB-AC56 1300

Physical Setup:

The router is connected to the master socket via an ADSL faceplate filter in the lounge.
The computer is upstairs a fair distance away from the router with a direct line of sight passing through at least 2 interior walls and one brick wall. The dongle is connected directly to a USB 3.0 port (with latest mboard USB 3 drivers installed)

Software Setup:

Router: I am using the latest Merlin software - As found here
I have setup the 2.4 Ghz and 5.0 Ghz wireless channels with different SSIDs.
2.4 Ghz channel: 11 (extension below)
5.0 Ghz channel: 44 (auto 20/40/80) (auto up or down extension)

*channels are always dependent on what is going on at a local level, e.g. interference from neighbours and home devices. These are just what worked well for me.

Windows 10: Connected the dongle. Installed latest Asus drivers found here
I also installed the asus utility found in the same place but this is not essential. It gives real time connection speed with the router and search facility to see which networks in your area are using which channels.

Tweaks: In order to get stability in the system - despite the utility giving me full signal at both 5Ghz and 2.4Ghz I had to make the following changes:

Start > Device Manager > Network Adapters > Asus USB-AC56 802.11ac wireless USB adapter - right click on this > Properties > Advanced

You will see the following menu:

0AQp44M.png


Then I changed the following settings from default:

  • BeamCap - VHT BEAM TX/RX
  • EnableAdaptivity - Auto
  • High Adhoc Mode - Disable
  • HLDiffForAdaptivity - 7
  • L2HHForAdaptivity - F5
  • LdpcCap - VHT LDPC TX/RX & HT STBC TX/RX
  • Preferred Band - 3. 5G first
  • QoS Support - Auto
  • StbcCap - VHT STBC TX/RX & HT STBC TX/RX
  • USB SF Mode - Disable
  • USB Switch Mode - Auto
  • VHT 2.4G - Disable (**This will disable connection at 802.11n - 2.4 Ghz - only use this if you are confident of a decent 5G signal)
  • WiFi Config - Performance
  • Wireless Mode - IEEE 802.11ac

Finally I switched off power saving on the USB device:

Start > Device Manager > Network Adapters > Asus USB-AC56 802.11ac wireless USB adapter - right click on this > Properties > Power Management

Uncheck: 'Allow the computer to turn off this device to save power'

Since making these changes the wifi connection has been rock stable. No dropouts, connection issues or otherwise.

Please feel free to use these settings and report back on how they have worked for you. If anyone knows what the *cap settings are all about it would be interesting to know.
 
Last edited:
I have now enabled this and seem to be getting a faster 5Ghz connection :)

VHT 2.4G - Disable (**This will disable connection at 802.11n - 2.4 Ghz - only use this if you are confident of a decent 5G signal)
 
So I guess the question is, is there a way of disabling win 10 from managing the wifi connection and allowing asus to do it?
 
So just a quick update...I decided to start messing about a bit with settings...always wanting more speed! After reading up on a few things I changed some settings that have definitely made the connection faster (and continues to be stable!).

The Asus RT-AC66U is still running Merlin software @ 380.66.4 (latest) and is in the same position it always was (downstairs - several walls away).

First thing I did was change the driver Win 10 was using for the Asus. There were reports the 2015 or even the 2013 driver was more stable/faster than the 2016 I was running.

Start > Device Manager > Network Adapters > ASUS USB-AC56 802.11ac Wireless USB Adapter > Driver (tab) > Update Driver > Browse my computer > Let me pick from a list:

NFeHxBx.png


All three drivers should be installed if you have installed the ASUS USB-AC56 Utility 2.1.1.5 For Windows (https://www.asus.com/uk/Networking/USBAC56/HelpDesk_Download/)

Once installed, this then gives you different network adapter settings to play with:

dMxOGxN.png


I haven't tried changing power levels for 5G (doesn't seem to make any difference to performance so left them alone)

These settings increased my connection to 867 mbps (channel remained at 40)

Antenna Diversity Type: Fixed
BeamCap: VHT BEAM TX/RX
EnableAdaptivity: Enable
High Ad-hoc Mode: Disable
HLDiffforAdaptivity: 7
L2HforAdaptivity: F1
LdpcCAp: VHT LDPC TX/ HT LDPC TX
Preferred Band: 3. 5G first
QoS Support: Support QoS
StbcCap: Disable
USB SF Mode: Disable
USB Switch Mode: USB Mode 3 (So these modes determine what sort of USB port you are connected to USB1 for Mode 1 / USB2 for Mode 2 / USB3 for Mode 3)
VHT 2.4G: Disable
VHT 2.4G IOT: Disable
Wifi Config: Performance
Wireless Mode: IEEE 802.11 ac

Hope that helps someone!
 
Back
Top Bottom