While it should be compatible bear in mind there are two versions of the card (as there are of most current Intel cards) -- one standard and backward compatible with older CPUs, and one newer that works only with newer Intel CPUs that support CNVio. Your system is older than CNVio, so you need the  standard model.  Buy the AX1650 x/w version for your system -- not the i/s version.  
I have a Dell XPS 15 (9560 model) and I am thinking of upgrading the current wifi 5 with a brand new wifi 6 Killer AX1650 card that is used with most recent versions of XPS 15. Is my laptop (or processor) compatible with this wifi card?   PS:I have already bought a Wifi 6 router... AVM Fritz!Box 4060. I'd like to take maximum advantage of this powerful router. Thanks.
WiFi card upgrade with XPS 15 9560