Blizzard Entertainment has released the minimum and recommended system specifications for the World of Warcraft expansion, Cataclysm. The specs ramp up the minimum computer needs a bit from where they stand now. Cataclysm is set to launch on December 7th so be sure your computer hits the mark.
OS: Windows 32bit (SP3), Windows XP 64bit (SP2), Windows Vista 32bit (SP1), Windows Vista 64bit (SP1)
Processor: Intel Pentium 4 1.3 GHz or AMD Athlon XP 1500
Memory: 1GB or more of RAM * Video: NVIDIA GeForce FX or ATI Radeon 9500 video card or better
Sound: DirectX-compatible sound card or motherboard sound capability
HDD: 25 GB free hard drive space
A keyboard and mouse are required. Input devices other than a mouse and keyboard are not supported
You must have an active broadband Internet connection to play