PC requirements

Mass Effect System Requirements

Mass Effect needs at least Intel P4 2.4 Ghz or faster / AMD 2.0 Ghz, 1.0 GB RAM or more (2.0 GB for Vista) and DirectX 9.0c compatible, ATI X1300 XT or greater (ATI X1300, X1300 Pro, X1600 Pro, Radeon 2600 HD, and HD 2400 are below minimum system requirements); NVidia GeForce 6800 or greater (7300, 7600 GS, 8500 are below minimum system requirements) graphics.

Verified Sources: Steam store listing
Mass Effect minimum and recommended PC specifications
Component Minimum
Processor Intel P4 2.4 Ghz or faster / AMD 2.0 Ghz
Memory 1.0 GB RAM or more (2.0 GB for Vista)
Graphics DirectX 9.0c compatible, ATI X1300 XT or greater (ATI X1300, X1300 Pro, X1600 Pro, Radeon 2600 HD, and HD 2400 are below minimum system requirements); NVidia GeForce 6800 or greater (7300, 7600 GS, 8500 are below minimum system requirements)
Storage 12.0 GB or more free hard drive space
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.
Playing on a handheld instead? Players report Mass Effect as Gold on Steam Deck and Linux.

Other platforms

Mass Effect is also available on these systems, where hardware is fixed and no per-PC check is needed:

Quick answers

Running Mass Effect on PC

Can my PC run Mass Effect?
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 Mass Effect need?
12.0 GB or more free hard drive space