Can Someone Please Explain This To Me

[f734k]

Why is the memory speed at 1200mhz when both RAM speeds are at 2400mhz?
Also my task manager shows that the RAM speed is at 1866mhz?
Can someone please enlighten me?

 

[Martin]

Difference between real (command) clock and effective data rate for DDR.

 

[f734k]

Difference between real (command) clock and effective data rate for DDR.

Oh, is there any way to change the speed level for the RAM since the laptop motherboard supports 2400mhz?