We still need to know if you have a REV 2.0 board? Chances are if the board is only 4 months old or newer it's a REV 2.0 board. Look between the pci slots on the board, It should say ASUS A7N8X then the REV edition (in tiny print).
If its a REV 2.0 it should have no problem itself hitting a 200 FSB fully supporting the Athlon XP3200 barton with a 200 FSB.
If its a REV 1.02 , 1.04, 1.06 it might only support a FSB of 180 - 190 but I here the latest bios might fix the limited FSB of the early A7n8x boards.
Still not sure try posting your question at
http://www.nforcershq.com in the ASUS section.
If I glanced at a spilt box of tooth picks on the floor, could I tell you how many are in the pile. Not a chance, But then again I don't have to buy my underware at Kmart.