@filipear123 

Hi,

What form factor does your computer's 2.4 GHz Wi-Fi use? Is it some sort of module that could be replaced?

Regarding the TX20U Plus. As per my personal experience the behavior you describe is quite common for USB-type Wi-Fi adapters. Although for purposes other than gaming this is not really an issue.

If it is an issue for you, then I recommend you either check if the 2.4 GHz Wi-Fi can be upgraded directly or use one of the four PCIe slots of your motherboard to add a PCIe Wi-Fi card. https://www.tp-link.com/en/home-networking/pci-adapter/?filterby=4884
 

 @woozle yea, I actually use for gaming (and I work with it), thats why I was concerned about it.

Considered just adding a new wi-fi card, but seems like it will still be unstable, feels like for gaming its either on ethernet or you cant rely 100%. 

I moved to new apartment, and basicly all the cabling is hidden behind a panel that is connected with kitchen and living room walls, so touching it will cost quite a few thousand bucks, but probably its what needs to be done. 

But living on a home I didnt really noticed the need of the ethernet. According to the technician of the ISP its due to apartments having too much conflicts, something I wasnt aware would happen (like on my old wi-fi card I would see like 10 wi-fi options, with the tx20u I see 100+ wifi`s , and its mostly of same ISP).

Maybe meanwhile there is some config I can use to avoid those conflicts?

  @filipear123 

You are right. If there are so many other Wi-Fi networks nearby, then your own Wi-Fi will always be affected.

And when there are so many neighboring Wi-Fi networks, then the chances you might find some unused channels in the 2.4 GHz or 5 GHz bands are close to zero, I suppose. Some Wi-Fi Analyzer programs or apps will grade the available channels and show you which channels are the least used and most used, but I don't know how accurate this is. Besides, many Wi-Fi routers are on the "Auto" channel setting anyway, so the occupancy of the bands will frequently change.

I think the only way to avoid those conflicts would be to upgrade to hardware that supports the 6 GHz band (both, the Wi-Fi router and the Wi-Fi card). But Wi-Fi routers that support the 6 GHz band are not cheap.

I live in an apartment building as well and there are about 20 neighboring Wi-Fi networks that show up in my computer's list. However, I have not yet noticed another 6 GHz Wi-Fi network showing up, other than my own. Therefore, at present I still have the 6 GHz band all to myself.