I do run 1440p/120Hz on most of my games and I don’t even have the 6650XT (I own an ASRock PG 6600XT).
It would be more than enough for most titles in medium-to-high settings at 1440p/120Hz. Some recent games (yes, you, Diablo 4) will max out the 8GB vRAM so you’ll have to tinker with settings until you hit a sweetspot but it manages 1440p.
Edit; as I wrote the reply, the card price increased to 400 CAD. Keep looking for deals, add them to your saved/watch list and order then.