Try the drivers from Intel website, always used them over manufacturer drivers and work's perfectly Intel® Driver & Support Assistant.  In fact I'm impress how the connection is good, even on wifi 5
Hello, I got a brand new XPS 15 9520 and I have some issues when I want to connect to 5ghz wifi.  The router works perfectly and the new XPS is in the same place as my previous laptop (which works on 5ghz very well) I tried to install the latest wifi driver, bios update etc but without luck. When trying to connect to my 5ghz wifi I get an error "can't connect to this network". And that's it. Nothing else happens.  I saw that many XPSs had WIFI card problems. Could this be the same issue? Any ideas? Thanks!   PS: I have the AX211 network card.
XPS 9520 5Ghz connection