Slow wi-fi connection speed between ASUS laptop and ASUS router

[oholyarchuk]

Laptop: ASUS Vivobook 16X OLED K3605VV-MX047 (90NB11U1-M001V0)
OS: Windows 11 Pro / Ubunty 22.04LTS
Router: Asus RT-AX57 (90IG06Z0-MO3C00 / 90IG06Z0-MU2C00)
Subject: connection from my laptop to the router has to be 1200Mbps, and it is, if I am using anober ASUS laptop and connection with my Android 9 phone is even faster.
While for now it floating from 500-700 mbps for windows and 350 mbps for Ubuntu
LAN connection is OK and is almost 1Gbps for real
What's wrong with Wi-Fi6 drivers?
Tried these two:
https://dlcdnets.asus.com/pub/ASUS/nb/Image/Driver/Networking/33949/WirelessLan_DCH_MediaTek_B_V3.3....
Gives 500-700 mbps connection in 5Hz mode and is floating.
https://dlcdnets.asus.com/pub/ASUS/nb/Image/Driver/Networking/33951/WirelessLan_PIE_DCH_Intel_B_V22.... 
Gimes 300-350 mbps in 5Hz mode.
Where is my close to 1 Gbps wi-fi-connection speed? Laptop is 3 meters away from lap-top.

[Falcon_ASUS · Accepted solution]

@oholyarchuk 

May I ask if you could provide screenshots of your laptop and other devices connected to the router for speed tests?
Additionally, is the operating system on your laptop self-installed? What is the current system version (operating system build number) and wireless network card driver you are using?
Also, could you please let me know the firmware version of your router? 
Have you attempted to reset the router hardware?
Thank you.

[oholyarchuk]

Thanks a lot @Falcon_ASUS for your feeback.
But I managed myself to fix it on my own.
Turned on hybrid frequency selection (20/40/80/160Mhz) for 5Ghz range instead of pre-selected 80Mhz.
Turned off automatic channel selection.
Downloaded Wi-Fy-Analyzer mobile app, inspected the best channel and selected manually channel number 100.
Switched WPA3 to WPA2, not sure yet if that affected connection speed.
And now I have constant connection speed between laptop and router at 2400Mbps, along with clean 1Gbps download/upload speed over wi-fi, which is 1Gbps LAN speed.  On both OS's, Windows 11 Pro and Ubuntu 22.04LTS. Dual boot. Boot OS's have recent updates. Router wifrmare also been updated.

[Falcon_ASUS]

@oholyarchuk
Understood, thank you very much for your message, updates, and sharing.

[oholyarchuk]

@Dylantuffin063 Thanks for your assistance. I've done all this, but issue still persist.