In order for you to play Mass Effect 3 (2012) on Windows with minimal graphics settings, your computer must meet the following requirements
OS *:
Win 7
Processor (CPU):
1.8 GHz Intel Core 2 Duo (equivalent AMD CPU)
Memory (RAM):
2 GB RAM
Graphics Card:
Supported chipsets: NVIDIA 7900 or better; ATI X1800 or better. Please note that NVIDIA GeForce 9300, 8500, 8400, and 8300 are below minimum system requirements, as are AMD/ATI Radeon HD3200, HD3300, and HD4350. Updates to your video and sound card drivers may be required.
DirectX:
Version 9.0c
Storage:
15 GB available space
Sound Card:
DirectX 9.0c compatible
In order to play Mass Effect 3 (2012) on Windows with maximum graphics settings, you need a computer with a configuration no worse than the following
OS *:
Win 7
Processor (CPU):
2.4 GHz Intel Core 2 Duo (equivalent AMD CPU)
Memory (RAM):
4 GB RAM
Graphics Card:
AMD/ATI Radeon HD 4850 512 MB or greater / NVidia GeForce 9800 GT 512 MB or greater
DirectX:
Version 9.0c
Storage:
15 GB available space
Sound Card:
DirectX 9.0c compatible