A Windows Vista Premium Ready PC has a good deal more requirements. It must have at least a 1 GHz 32-bit (x86) or 64-bit (x64) processor, 1GB of system memory, 128MB of graphics memory, 40GB of hard drive capacity with 15GB free space, a DVD-ROM drive, audio output capabilities, and Internet access capability.
Holy shit...1 GB of system memory? That is more than most games...