Is 1440p much harder to run than 1080p?

It is 78% more pixels, so expect roughly a third less FPS in a GPU-limited game — less than that when the CPU is the limit.

Does ultrawide hurt performance?

3440×1440 is about 34% more pixels than 1440p, so it lands between 1440p and 4K in GPU cost.

Home › Calculators › Aspect Ratio Calculator

Scale a resolution to any aspect ratio, find the missing width or height, and check the pixel count difference.

Name	Resolution	Ratio	Pixels
1080p	1920 × 1080	16:9	2.07 MP
1440p	2560 × 1440	16:9	3.69 MP
Ultrawide	3440 × 1440	21:9	4.95 MP
4K UHD	3840 × 2160	16:9	8.29 MP
Super ultrawide	5120 × 1440	32:9	7.37 MP

Is 1440p much harder to run than 1080p?: It is 78% more pixels, so expect roughly a third less FPS in a GPU-limited game — less than that when the CPU is the limit.
Does ultrawide hurt performance?: 3440×1440 is about 34% more pixels than 1440p, so it lands between 1440p and 4K in GPU cost.