Some effects don't work with the newer ATI cards...who knows why.
My ole' x800GTO ran fine, so long as I had Shiny Water disabled.
My HD 2600XT required that, plus character mapping, or something like that.
...but, my GeForce 8800GTS 512 runs it with everything turned on, no problem.
cf:
http://www.ironworksforum.com/forum/...hlight=x800GTO