PC requirements

Crusader Kings II: The Reaper's Due System Requirements

Crusader Kings II: The Reaper's Due 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: The Reaper's Due minimum and recommended PC specifications
Component Minimum
Operating system Windows 7
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
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Other platforms

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

Quick answers

Running Crusader Kings II: The Reaper's Due on PC

Can my PC run Crusader Kings II: The Reaper's Due?
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: The Reaper's Due need?
2 GB