Official Site:
Call of Duty, World at War
System Requirements:
Processor: AMD 64 3200+/Intel Pentium 4 3.0GHz or better
Memory: 8 GB free hard-drive space, 512MB RAM (XP)/1GB RAM (Vista)
Graphics: Shader 3.0 or better, 256MB Nvidia GeForce 6600GT/ATI Radeon 1600XT or better
Source :
Call of Duty: World at War Q&A - PC Graphics and Features - PC News at GameSpot
World at War will feature cooperative gameplay with up to four players via split screen on consoles, or four players online
Can't wait for the online co-op mode.