Are you using CPU-Z to get these readings, or is this in bios?
And did you do an fsb overclock?
If youre overclocking your CPU, a 1333 setting can be OCed to this. When you Overclock your CPU without using multipliers, it changes the ram as well.
I am reading it in the Bios and i have not done any overclocks.
your RAM multiplier is just stepped back I think. try a manual step if it doesnt start making sense.