systems need to run memory in ratio so reguardless of 800mhz (400x2 aka Double Data Rate - DDR) the system is running it the way it should.
Forgot to multiply the speed by two, but it was still running under what I expected. I'll never trust crucial scanner again. Everest seems to be more accurate. At least I paid about 6 dollars over the slower RAM. Not that much of a difference.