"4k" (3840 x 2160)= 6,374,4005120x1440 = 7,372,800"true" 4k (3840x2160) = 8,899,200so i guess it depends which numbers you go by. I go by the common standard but yeah my monitor is also 5120x1440)
Your "4k" and "true" 4k have the same resolution. ;) I only know 4k as 3840x2160, and that's 8.294.000...