The Rise of the Witch-king system requirements are mostly the same as for The Battle for Middle-earth II, with the only exception is that you must have BFME2 installed in order to play RotWK.
- Operating System
Required: Windows XP
Not supported: Windows 2000 or lower - CPU
Minimum: Intel Pentium 4 or AMD Athlon with 1.6 GHz - Memory
Minimum: 512 MB RAM
Recommended: 1 GB RAM - Graphics card
Minimum: NVIDIA GeForce 3 / ATI Radeon 8500; 64 MB VRAM 3D graphics card
Not supported: NVIDIA GeForce 4 MX, ATI Radeon 9200/9250 - Sound card
Required: 100% DirectX 9.0c compatible PCI, USB, or onboard audio device - Optical Media
Required: 8x speed DVD-ROM drive
Recommended: 16x speed DVD-ROM drive - DirectX
Microsoft DirectX 9.0c - Installation
3.0 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: 56.6 Kbp/s Internet connection (2 players)
Recommended: broadband-class connection (2-8 players)
Internet/LAN: supports 2 to 8 players - Input Devices
Required: keyboard, mouse