First, confirm what model G752VS you have by running dxdiag, see below:
Then run HWiFO64, see below:
1 = shows the stick of memory being read (Manufactuer P?N)
2 = type of memory
3 = timings of the memory
4 = toggle the 'V' to read other sticks of memory
Try to match the memory that came with your laptop, most likely faster memory will not run any faster than what is in there. Don't mix brands and types, for best results make all memory from one manufacturer and one type.
Good luck.
G752VSK, G75VW-3D, G51J, G1S
Homebuilt Windows Server