Question about main logic board replacement on an A1055 model

Hi,

I have an old iBook that has been through the mill, so to speak. I am pretty sure that the main logic board is shot, for the life of me I cannot remember the MHz of the original board, it's been that long since I had it running!! Replacement boards come in different speeds, 933 MHz, 1 MHz, etc, does it matter what board I replace it with as long as it is a board for an A1055?

Thanks,

Rolly