Windows 10: Would a ram with higher MHz bus than motherboard's overclock better ?

Ok so I was considering a ram upgrade to 16 GBs Kingston HyperX in a laptop of 1600 MHz bus . Kingston have a selection of three bus rams I can buy : 1600 , 1866 , 2133 . The only problem is return policy as I am going to buy them on a trip and will be back home by return due date .

1 - I am used to over clocking my older rams using Intel Extreme program , highest I can get though is raising it to bus 900x2 (1800) where any higher and the system might freeze , now I wonder if I can get rams that were actually designed to run at even higher speeds would overclocking run at higher clock than that since theoretically it can deal with heat much better on such buses ?

2 - Also everybody keep telling me that rams with higher bus would run fine on a system only underclocks to system bus , I have had an experience in distant past that a laptop rejected to boot with different bus rams , was that issue solved in modern rams ?

:)

 

HyperX Automatic Overclocking the higher MHz the better ?

I am aware of the slow down the rams will get to meet system's bus which is actually 1600MHz however my question is :
Wouldnt buying a ram that is capable of operating at a higher bus act better when over-clocked since it is designed to work at nearly double the bus speed ?

Also please from whomever had a HyperX or similar upgrade would you hint us some on how it works ?

 

HyperX Automatic Overclocking the higher MHz the better ?

Does your laptop permit overclocking?

 

HyperX Automatic Overclocking the higher MHz the better ?


Ok so I was planning to upgrade rams on a DDR3L 1600MHz laptop I have and then I cam across an interesting finding that Kingston managed to make rams that can automatically overclock themselves . They have been around for a while now but till date I see no in depth information of how they work nor real support from Kingston's side , nothing but braggers that just like to post they have one up their rigs .

So basically my question is , I found HyperX rams to come in 3 speeds 1600 , 1866 & 2133 with minor difference in price , now that my laptop's bus/cpu are designed to operate at 1600MHz wouldn't it still be better if I went for the 2133MHz version knowing it can handle the overclocking heat much better that the thing is actually designed for near DDR4 speed ?

P.S I have tried both my laptop's & kingston support and had no feed back from both since on that one .