RT-AC68U beamforming and 2x2 AC adapter

[wouterv]

A new laptop in the family has an Intel AC 9560 2x2 / 160 MHz wireless adapter.
The router is a RT-AC68U with 3.0.0.4.385.10000 firmware.
The router settings are pretty default, wireless professional was all default with 802.11ac Beamforming and Universal Beamforming Enabled.
I noticed that the 9560 adapter connected with 433.3M Tx rate and 866.7M Rx rate.
After I disabled both Beamforming settings in the router the Tx rate went up to 866.7M as I expected it to be.
I haven't experimented yet with disabling just one of them.

What is the matter or or what are other experiences with Beamforming versus Tx and Rx rate?

 

[Grisu]

Universal beamforming is often mentioned to better be turned off (and same with airtime fairness) while explicit beamforming shouldn't be a problem with newer devices.

 

[wouterv]

Yes right, Disable Airtime Fairness and Disable Universal Beamforming in the 5 GHz Professional section seems sufficient to bring 802.11ac fully alive

Here the 5 GHz rates, the first one is a 2x2 AC client, the second is a 1x1 AC client: