My system: ASUS A7N8X, Athlon 2400+, 512mb DDR 2100, BFG 6800oc 128mb

During gaming I run my resolution @ 1024x768 and with my new card I
thought I should be able to run Far Cry at high detail. It runs but there
are hiccups and slows down when there is a lot of action on the screen.
I'm wondering what I need to run this game at high detail? My card should
be fast enough right? Do I need to upgrade my processor or would more RAM
fix me up?

Ozman