I play with the 5ghz channel, I set channel bandwith to 20mhz and Channel to 36(Use Wi-Fi Analyzer) to make sure it's not an issue caused by interference with other channels.
Go in the Wireless->Professional Tab
https://imgur.com/a/Dnj161x Those are my settings for 2.4ghz and 5ghz, if you are using time sensitive applications you must first of all disable TX-Bursting, AMPDU-Aggregation.
Airtime fairness may prioritize devices based on being faster/closer to the router, since my AX200 devices is the further from the router I disabled this setting.
Go to the device manager-> Intel(R) Wi-Fi 6 AX200 160Mhz and tweak this settings:
- Global BG Scan Blocking: ALWAYS
This setting prevents your wifi card from periodically searching for new Access Points, it is automatically set to "never", so your wifi card is always scanning.
- MIMO power save mode: Without SMPS
You don't need this power saving feature, keeping it disabled
may benefit throughput.
*power saving feature
- Packets Merging: Disabled
It's another power saving feature, it reduces the number of receiving interrupts by randomly merging packets.
( I may have mistranslated the name of this last setting, I can't find info about this settings that are not in my native language)
I can now play games while pinging the router with a stable 1ms, before I used to have 30-90ms spikes every 5 seconds which where quite noticeable.
Don't forget to update your AX200 drivers to 21.80.2.