So simply put 3200 CL16 XMP DIMMS which is rated @ 1.35V won't run stable @ 1.2V which is what most Laptops DIMM voltage is locked at.
Most Laptop BIOS do not allow DIMM over-voltage! So you are stuck @ 1.2V for your DIMM voltage on the majority of Laptops.
Does not matter if 1.35V which is...