In order for you to play Mass Effect 2 (2010) on Windows with minimal graphics settings, your computer must meet the following requirements
OS *:
Windows XP SP3 / Windows Vista SP1 / Windows 7
Processor (CPU):
1.8GHz Intel Core 2 Duo or equivalent AMD CPU
Memory (RAM):
1 GB RAM for Windows XP / 2 GB RAM for Windows Vista and Windows 7
Graphics Card:
256 MB (with Pixel Shader 3.0 support)
DirectX®:
DirectX 9.0c August 2008 (included)
Hard Drive:
15 GB
Sound:
DirectX 9.0c compatible
Supported Chipsets:
NVIDIA GeForce 6800 or greater; ATI Radeon X1600 Pro or greater. Please note that NVIDIA GeForce 7300, 8100, 8200, 8300, 8400, and 9300; ATI Radeon HD3200, and HD4350 are below minimum system requirements. Updates to your video and sound card drivers may be required.
In order to play Mass Effect 2 (2010) on Windows with maximum graphics settings, you need a computer with a configuration no worse than the following
OS *:
Windows XP SP3 / Windows Vista SP1 / Windows 7
Processor (CPU):
2.6+ GHz Core 2 Duo Intel or equivalent AMD CPU
Memory (RAM):
2 GB RAM
Graphics Card:
ATI Radeon HD 2900 XT, NVIDIA GeForce 8800 GT, or better recommended
DirectX®:
DirectX 9.0c August 2008 (included)
Hard Drive:
15 GB
Sound:
DirectX 9.0c compatible