ddr works at 266, 333, and 400 ( my motherboard supports 400 max...,184 pin pc3200/pc2700/pc2100 compatible...ddr2 is not compatible)
i´m quite sure that i bought the correct memory for my motherboard, the pins are the same , i read before the manual and in the store the list is very clear.
but some times buy hardware is difficult
I am going to use only the 1gb stick and remove the old.
thanks