what would it do

[ataxy]

in wpcredit offset 7b bin 0 permit to change pci bus frequency from pin MAB of the chipset but i do not understand ,isnt that way to much freq for a pci port since 33mhz is normal what is the use of 66mhz wich i think would make fried egg of you sound or nic card
this is on the 694x chipset