256 MB with Pixel Shader 3.0 support. (NVIDIA GeForce 7900 or better; ATI Radeon X1800 or better. Please note that NVIDIA GeForce 9300, 8500, 8400, and 8300 are below minimum system requirements, as are AMD/ATI Radeon HD 3200, HD 3300, and HD 4350.)
Below are some gaming computers with images that show how many games will run on each.
Each computer was tested against the minimum and recommended requirements of over 2,000 of the latest PC games.
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Mass Effect 3: Earth Recommended Requirements
2.4 GHz Intel Core 2 Duo (equivalent AMD CPU)
2 GB for XP / 4 GB RAM for Vista/Win 7
Windows XP SP3, Vista SP1, Win 7
AMD/ATI Radeon HD 4850 512 MB or greater, NVIDIA GeForce 9800 GT 512 MB or greater