Firstly, list my config:
AMD XP2200+
GF4 Ti4200 display
512MB DDR333 RAM
4XFSAA activated
I use this config to play 2003 "smoothly" with only "high detail"
With maximum detail, the fps drop obviously.
With so many new features(I belived the newly-designed crowd animation and 10-man freestyle will be harsh for old config.), I just cannot imagine how demanding will 2004 be...sigh...