hardware question

["Zachary Florian" <icthusianz@xxxxxxxxxxxxx>]

alrighty here's the problemo:

    a friend of mine has a computer which he put together... he just dropped
a new MotherBoard and Processor in it and is now having some problems... in
what would be considered problems the main part is that the computer is
acting much slower than it should, and sometimes won't run the program it is
supposed to... now my friend swapped the RAM from his old mobo to the new
one, could the problem be that the old RAM is at 66mHz while the new mobo is
designed to run at 100mHz? what kind of result would that have on the
computer's functioning?