Hello, Im running Doom 3 on a AMD XP 2000 with 1gig of ram and a FX5900XT @10x 7 resolution Higth detail 2x AA,Vertical sync off.I used Fraps to benchmark my system and Im running 65 +\- 3 FPS. Im very happy with what I got. the game looks amazing and it will be on my PC for a long time. anyone outhere thats running Doom 3 on a Lower system?