PC requirements

Dark Souls: Prepare to Die Edition System Requirements

Dark Souls: Prepare to Die Edition needs at least Intel Core 2 Duo E6850 GHz+ or AMD Phenom II X2 545 3.0 GHz+, 2 GB of RAM and GeForce 9800 GTX+ or ATI Radeon HD 4870+ graphics.

Verified Sources: Steam store listing
Dark Souls: Prepare to Die Edition minimum and recommended PC specifications
Component Minimum
Operating system Windows XP , Windows Vista, Windows 7, or newer
Processor Intel Core 2 Duo E6850 GHz+ or AMD Phenom II X2 545 3.0 GHz+
Memory 2 GB
Graphics GeForce 9800 GTX+ or ATI Radeon HD 4870+
Storage 4GB
Not sure how your PC compares? Use the Can I Run It checker — pick your CPU and GPU and it tells you which column you land in.

Other platforms

Dark Souls: Prepare to Die Edition is also available on these systems, where hardware is fixed and no per-PC check is needed:

Quick answers

Running Dark Souls: Prepare to Die Edition on PC

Can my PC run Dark Souls: Prepare to Die Edition?
Compare your CPU, GPU and RAM against the minimum column below. If your parts match or beat every minimum row, the game will launch — though you may need to lower settings. Matching the recommended column is what gets you 60fps at 1080p.
How much storage does Dark Souls: Prepare to Die Edition need?
4GB