Assassin's Creed 2 Requirements:
Processor: Dual core processor 2.6 GHz Intel® Pentium® D or AMD Athlon™ 64 X2 3800+ (Intel Core® 2 Duo 2.2 GHz or AMD Athlon 64 X2 4400+ or better recommended)
RAM: 3 GB Windows XP / 2 GB Windows Vista
Video Card: 256 MB DirectX® 10.0-compliant video card or DirectX 9.0-compliant card with Shader Model 3.0 or higher (see supported list)*
Sound Card: DirectX 9.0 or 10.0-compliant sound card (5.1 sound card recommended)
DirectX Version: DirectX 9.0 or 10.0 libraries (included on disc)
DVD-ROM: DVD-ROM dual-layer drive
Hard Drive Space: 12GB
Peripherals Supported: Keyboard, mouse, optional controller (Xbox 360® Controller for Windows recommended)
Processor: Dual core processor 2.6 GHz Intel® Pentium® D or AMD Athlon™ 64 X2 3800+ (Intel Core® 2 Duo 2.2 GHz or AMD Athlon 64 X2 4400+ or better recommended)
RAM: 3 GB Windows XP / 2 GB Windows Vista
Video Card: 256 MB DirectX® 10.0-compliant video card or DirectX 9.0-compliant card with Shader Model 3.0 or higher (see supported list)*
Sound Card: DirectX 9.0 or 10.0-compliant sound card (5.1 sound card recommended)
DirectX Version: DirectX 9.0 or 10.0 libraries (included on disc)
DVD-ROM: DVD-ROM dual-layer drive
Hard Drive Space: 12GB
Peripherals Supported: Keyboard, mouse, optional controller (Xbox 360® Controller for Windows recommended)