I recommend sticking to non XMP 1.2V RAM.

I just got a LAPKC71F, it appears to have stability issues with the below... I am still testing however just in case my unit is faulty.

BL2K32G32C16S4B (2X32GB 3200 1.35V) - When using XMP which sets 1.35V - lock up, black screen, bluescreen.

BL2K16G32C16S4B (2X16GB 3200 1.35V) - When using XMP which sets 1.35V - lock up, black screen, bluescreen.

HX432S20IBK2/64 (2X32G 3200) - When using XMP profile 1&2 which both set 1.35V according to the BIOS - lock up, black screen, bluescreen.

The HyperX kit is completely fine when not using XMP, leaving it default which still runs 3200mhz

NOTE: I had no problems at all running BL2K32G32C16S4B in the LAPKC71E that I had... Potentially unit to unit variance or for whatever reason different display panels/GPU/CPU combinations may explain that behavior. It may have even been known by the engineers that designed the laptop and that's why 1.35V/XMP RAM is unsupported.

I no longer have the LAPKC71E.