Aspiring techie said:
Speccy is right. RAM frequency is always half of the number that comes after DDR3. DDR3 1333 really means that it can do 1333 MTs per second. DDR3 technology allows RAM to do 2 transfers per clock cycle, thus the data rate is double the clock speed.
This. CPUz looks to be pulling the spec while Speccy is pulling what it is currently set at.