According to the last update from Ubisoft’s UK Forum Manager “Mr_Shade” Assassin’s Creed Brotherhood PC is set to be released this March 17th 2011.
Video Card: 256 MB DirectX 10 or DirectX 9.0¨Ccompliant card with Shader Model 3.0 or higher
Sound Card: DirectX 9 or 10 compliant sound card
RAM: 2 GB
Hard Drive Space: 12 GB
DVD-ROM dual-layer drive