These are the system requirements for Command & Conquer 4: Tiberian Twilight.
- Operating system
Required: Windows XP SP3, Vista or Windows 7 (32-bit/64-bit)
Not Supported: Windows 2000 or lower - CPU
Minimum: Intel Core 2 Duo / AMD 64 X2 or better
Recommended: Intel Core 2 Duo 2.6 GHz; AMD Athlon 64 X2 Dual-Core 5600+ - Memory
Minimum: 1 GB (1.5 GB for Vista and Windows 7)
Recommended: 2 GB RAM or more - Graphics card
Minimum: 256 MB (SM 3.0) – Nvidia GeForce 6800 / ATI Radeon X1600 or better
Recommended: 256 MB (SM 3.0) – Nvidia GeForce 8800 / ATI X1900 or better - Sound card
Required: DirectX 9.0c compatible sound card - Optical media
Required: 8x speed DVD-ROM drive
Recommended: 16x speed DVD-ROM drive - DirectX
Microsoft DirectX 9.0c - Installation
10 GB or more of free hard drive space; plus an allowance of additional free space available after installing the game for save games and Windows file caching. - Internet connectivity and multiplayer support
Minimum: 512 Kbp/s Internet connection (2 players)
Recommended: 2 Mbp/s Broadband-class connection (2-10 players)
Internet: supports 2 to 10 players with VoIP support
Not supported: LAN connectivity
Internet connection required even for singleplayer content. - Input devices
Required: keyboard, mouse
Optional: VoIP headset