PC requirements

Europa Universalis III System Requirements

Europa Universalis III needs at least 1.9GHz Intel Pentium 4 or AMD Athlon processor or equivalent, 512MB RAM (1.0GB RAM is highly recommended) and 128MB Video Card with Hardware T&L and support for Pixelshader 2.0 or better graphics.

Verified Sources: Steam store listing
Europa Universalis III minimum and recommended PC specifications
Component Minimum
Operating system Windows® 2000 (with Service pack 1 or higher) or Windows® XP (Home/Professional/Media Edition) with Service Pack 2, or later Windows versions.
Processor 1.9GHz Intel Pentium 4 or AMD Athlon processor or equivalent
Memory 512MB RAM (1.0GB RAM is highly recommended)
Graphics 128MB Video Card with Hardware T&L and support for Pixelshader 2.0 or better
Storage At least 1GB of free hard drive space to accommodate game files and saved games. This does not include any space used by the Win
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

Europa Universalis III is also available on these systems, where hardware is fixed and no per-PC check is needed:

Quick answers

Running Europa Universalis III on PC

Can my PC run Europa Universalis III?
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 Europa Universalis III need?
At least 1GB of free hard drive space to accommodate game files and saved games. This does not include any space used by the Win