THIS GAME IS GREAT!!! im not even a big fan on RTS games, but this tops the cake! the online play is amazing! download the demo.
For the computer requirements, u need a pretty good pc... here are the requirements...
System Requirements
Operating System: Windows® 98/ME/XP/2000
CPU: 1.5 GB Processor.
Hard Disk Space: 3GB HD space.
RAM: 512 MB RAM.
VIDEO: GeForce3 64 MB or Ati Radeon 8500 64MB or greater (True DX8 Graphics Card with 64MB RAM i.e. Video Cards with at least pixel-shader technology - GeForce4 MX isn't supported).
CPU: DirectX 8.1 Certified Sound Card.
CPU: Broadband or 56kb modem (multiplayer).
DX: DirectX: DX9.1 (included) but DX8.1 supported.
I have above those and i only get 25 FPS on ultra settings... but i dont notice any FPS lag.