The highest contrast ratio of the Acer S236 is 100000000:1. That's over twenty times the contrast ratio of the most common dynamic contrast ratio of 5000000:1.
A 100000000:1 dynamic contrast ratio is actually the best contrast ratio amongst all PC displays that are a similar age to the S236.
The worst contrast ratio amongst comparable types of PC display is Mega Contrast.
We compared all the other PC monitors that have a 100000000:1 dynamic contrast ratio to this PC display and we think the Acer 42HQL ($121.31) which is cheaper; or the G277HL ($127.99), and the K242HQL ($102.99) both from Acer which has a better Rating are also worth considering.