does ur mobo has a pcix16 slot ????? i think ur confused about pcix1 slot and the pcix16 slot .... u need a pcix16 slot for a pcix grahics card .....
http://www.asus.com/products4.aspx?m...3&l2=14&l3=149
if that is ur card the u'll have to go for an agp8x card .....