Black Desert is now the most visually stunning MMORPG in the market. Although you don't need a monstrous machine to run the game, you can't play it in max settings at 2560×1600 resolution, let alone 4K res. Russian hardware site gamegpu.ru just did a GPU test with over 30 different graphic cards of Nvidia and AMD's.
The test is conducted on Black Desert Russian version.
Even at low settings the game doesn't look bad at all. Click the image for full size version.
AA off vs. AA on