Question about ASUS ROG XG49WCR

Is an RTX3080 10GB scarce here? High FPS are secondary for me, the important thing is that it runs smoothly. Currently 34" 1440P and throttled to 60hz to keep temps lower and the volume down. What I like to do is to set the settings in games to the highest/second-highest level, e.g. individual medium points, shadows, fog and hair Dlss activated if this is available. If the 3080 can't handle this I would go for the alternative in 49" with 3480x1080p from Asus. However, a little concerned about resolution.