The listing, Mass Effect 2 PC Game - Origin has ended.
More info:http://store.origin.com/store/ea/en_US/pd/productID.150391400
Requirements:
Windows XP or Vista
Single core - Pentium 4 - 2.4 GHz or AMD
Multicore Pentium - 2.0 GHz or AmD
1 GB RAM
18 GB free HD space
1x or better DVD-ROM drive
NVIDIA GeForce 7 series (7600 or better) or 8 series (8600 or better)
ATI X1600 XT or better (X1600 Pro and HD2400 are below minimum system requirements)
Shader Model 3.0 required
100% DirectX 9.0c compatible sound card and drivers. DirectX 9.0c November 2007 (Included)