y50-70 Max ram speed

[Kazooo]

I'm planning on upgrading my y50-70 from 12gb of ram to 32gb of ram.
I found both 1600 MHz and 1866 MHz options for sale.
I unsure if the y50-70 can go faster then 1600 MHz as the cpu specs on intel say it supports 1333/1600 MHz.
Another thread on this site says there laptop ran at 1777 MHz using 1866 MHz sticks, which seems odd to say the least.
Is it bad to run at 1777 MHz would that be unstable? faster/slower? damage my computer?

Basically should I get the 1600 MHz or the 1866 MHz and why. Please explain. Thanks!

Intel Core i74710HQ Processor 6M Cache up to 3.50 GHz Product Specifications
 

 

[Guest]

from what i can find y50-70 can only go to 16gb ram max. As for the speed generally i would always go with the laptop original ram speed, since depending on how the laptop is setup with higher speed ram its either not compatible at all or they will downclock the ram to the supported speed.