I think I have the lowest end computer in general...

1.2 GHz
128MB SDRAM (with XP in the background this is very much too little)
64MB Graphics card

When I tried out with the lowest settings it ran like hell... It was choppy to the extreme, no fun.
Then I cranked up the graphics to a normal low spec (1024*768 up from 800*600 and shadows and quite detailed troops). Now the game ran almost perfectly... If I kept away from closeups that is. Spears vanished as soon as I neared the fight and it looked a little bland, but other than that it was good. I was impressed, but at te same time I cincerely want to get a new computer.