DDR3 1333MHZ runs at 667mhz?

[gooform]

Dear Community,
I recently built a new machine just for home use. Although when i check my Ram with CPU-z it shows i only run it at 667Mhz and not 1333mhz as advertised. I am pretty good with computers. just some things i am not sure on.
Is it suppose to be like this? or am i missing a setting i was suppose to set?


Not sure if it's required.


Mushkin Enhanced Silverline 4GB 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666)
http://www.newegg.com/Product/Product.aspx?Item=N82E16820226094


Biostar A880G+
http://www.newegg.com/Product/Product.aspx?Item=N82E16813138283&cm_re=biostar_a880g%2b-_-13-138-283-_-Product


Below i list pictures of CPU-Z timings.

 

[ineedaname8]

Since its DDR memory its Double Data Rate so you have to multiplay that number you see in cpuz by 2 and then you get your 1333mhz.

 

[gooform]

Best answer selected by gooform.