PC requirements

Crusader Kings II System Requirements

Crusader Kings II needs at least Intel® Pentium® IV 2.4 GHz or AMD 3500+, 4 GB RAM and NVIDIA® GeForce 8800 or ATI Radeon® X1900, 512mb graphics memory required. graphics.

Verified Sources: Steam store listing
Crusader Kings II minimum and recommended PC specifications
Component Minimum
Operating system Win7 64-bit
Processor Intel® Pentium® IV 2.4 GHz or AMD 3500+
Memory 4 GB RAM
Graphics NVIDIA® GeForce 8800 or ATI Radeon® X1900, 512mb graphics memory required.
Storage 2 GB
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

Crusader Kings II is also available on these systems, where hardware is fixed and no per-PC check is needed:

Quick answers

Running Crusader Kings II on PC

Can my PC run Crusader Kings II?
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 Crusader Kings II need?
2 GB