PC requirements

The Witcher System Requirements

The Witcher needs at least Intel Pentium 4 2.4 GHz or Athlon 64 +2800 (Intel Pentium 4 3.0 GHz or AMD Athlon 64 +3000 recommended). Athlon XP series, such as the Athlon XP +2400, is not supported, 1 GB RAM (2 GB RAM recommended) and NVIDIA GeForce 6600 or ATI Radeon 9800 or better (NVIDIA GeForce 7800 GTX or ATI Radeon X1950 XT or better recommended) graphics.

Verified Sources: Steam store listing
The Witcher minimum and recommended PC specifications
Component Minimum
Processor Intel Pentium 4 2.4 GHz or Athlon 64 +2800 (Intel Pentium 4 3.0 GHz or AMD Athlon 64 +3000 recommended). Athlon XP series, such as the Athlon XP +2400, is not supported
Memory 1 GB RAM (2 GB RAM recommended)
Graphics NVIDIA GeForce 6600 or ATI Radeon 9800 or better (NVIDIA GeForce 7800 GTX or ATI Radeon X1950 XT or better recommended)
Storage 15 GB Free
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 Witcher is also available on these systems, where hardware is fixed and no per-PC check is needed:

Quick answers

Running The Witcher on PC

Can my PC run The Witcher?
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 Witcher need?
15 GB Free