Ram overclock, gone?1?

Hey, about 4 months ago I overclocked my G skill ram F2-8500CL5-2GBPK from 800 to 1066 but now I go look at CPU-Z and it shows the DRAM frequency at 400.7MHz

Now works out to be 800Mhz correct? so its some how reveresed back to 800Mhz form my overclock of 1066.

Whats happened?

I also cant find the options to overclock it back and cant rememember how to.

any help?

Thank you.