The Predator X34 has a maximum contrast ratio of 100000000:1. That's over twenty times the contrast ratio of the most frequently found dynamic contrast ratio of 5000000:1.
A 100000000:1 dynamic contrast ratio is actually the best contrast ratio across all comparable spec LCD screens that have been available for more than a year.
Across similar types of PC monitor the worst contrast ratio is Mega Contrast.
It may also be worth also looking at one of the other PC screens that have a 100000000:1 dynamic contrast ratio currently available including the B326HKA, or the Predator Z35 ($707.99) both from Acer or the Asus PB279 ($499.00) which has a better Rating.