http://www.destructoid.com/preview-dark-souls-prepare-to-die-edition-233137.phtml
"As painful as this is for PC gamers to hear, this particular release will be a near direct port of the console version and will be capped at 30 frames-per-second. Moreover, the customization options for the game are limited to display resolution and frequency, anti-aliasing, and motion blur.
From Software’s reasoning behind this is because
they wished to offer an equal experience to its console counterpart, in terms of visual fidelity and gameplay.
"
Mais bien sûr. 