This is a given, as 165Hz can display 144Hz just fine, but there’s no need to. The difference between the two refresh rates is small, so a GPU that handles 144Hz will do 165Hz with little difficulty. This applies in particular to 1080p. As a rule, while 144Hz is fine on 165Hz, it’s still better to set everything as close to the native specs of the monitor as possible. But 165Hz doesn’t have neat multipliers as do native 60Hz and 120Hz panels, being essentially a “custom” refresh setting. That allows for more flexibility, and great support for 144Hz and other refresh rates.