[SOLVED] I need some help .... Lenovo Yoga 530

[lenovo_radek_^^]

Hi, could someone possibly explain me what's is going on with my laptop . I was thinking about changing memory inside but I had noticed something different. I need to know which of the speed ram is correct the windows shows me different than the programs . I checked my memory on Lenovo website and that's the result :
M471A5244CB0-CTD
I'v got inside these ram but why the MGz are not the same ? I'll give you a screenshot

 

[lenovo_radek_^^]

Thanks , I know where is the problem . My ram's module are 2666 but the CPU can handle 2400 speed module .