PC requirements

The Sims 3: Supernatural System Requirements

The Sims 3: Supernatural needs at least For XP 2.0 GHz P4 processor or equivalent; For Windows Vista and Windows 7 2.4 GHz P4 processor or equivalent, 2 GB RAM and 128 MB Video Card with support for Pixel Shader 2.0 graphics.

Verified Sources: Steam store listing
The Sims 3: Supernatural minimum and recommended PC specifications
Component Minimum
Operating system XP SP2 / Vista SP1 / Windows 7
Processor For XP 2.0 GHz P4 processor or equivalent; For Windows Vista and Windows 7 2.4 GHz P4 processor or equivalent
Memory 2 GB RAM
Graphics 128 MB Video Card with support for Pixel Shader 2.0
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

The Sims 3: Supernatural is also available on these systems, where hardware is fixed and no per-PC check is needed:

Quick answers

Running The Sims 3: Supernatural on PC

Can my PC run The Sims 3: Supernatural?
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 The Sims 3: Supernatural need?
Storage requirements are not published for this title yet.