The Warhammer Herald outlines system specifications for Warhammer Online: Age of Reckoning (thanks Strategy Informer). The post lists specific supported graphics cards, and here's general word on what it will take to run EA Mythic's upcoming MMORPG:

For Windows XP

· 2.5 GHz P4 (single core) processor or equivalent
· 1 Gigabyte RAM
· A 128 MB Video Card, with support for Pixel Shader 2.0
· At least 15 GB of hard drive space

For Windows VISTA

· 2.5 GHz P4 processor or equivalent
· 2 Gigabyte RAM
· A 128 MB Video Card, with support for Pixel Shader 2.0
· At least 15 GB of hard drive space