please paste a screenshot off all the tabs in cpu-z
http://www.cpuid.com/cpuz.php
what is your ram ratio ??????
you will never get to 900mhz on your ram . nor would you want to!
that would put your ram running far faster with a wider bandwidth than your cpu could ever hope to make use of
hell / with the E8400 and its 1333mhz FSB the DDR2-800 ram doesnt really like anything above 870-890mhz tops!