You can check the SPD interface on CPU-Z. Free user support. DDR3 1600MHZ=PC3-12800, CL11. No buffering.
Crucial DDR3L 16GB 2X8GB 1600 MHz PC3L-12800 1.35V Notebook Sodimm Memory RAM
Crucial DDR3 16GB (2X8GB) KIT 1600 MHz PC3-12800 DIMM 240-Pin Non-ECC Memory RAM
Crucial DDR4 16GB 2x8GB 2666MHZ PC4-21300 Non-ECC Laptop Memory RAM 1.2V 260-Pin
Crucial DDR4 16GB 2x8GB 2133MHZ PC4-17000 1.2V 260-Pin Non-ECC Laptop Memory RAM
Crucial DDR4 16GB 2x8GB 2400MHZ PC4-19200 1.2V 260-Pin Laptop Memory RAM Non-ECC
Crucial DDR3L 16GB 32GB 1333MHZ 1600MHZ Memory SO-DIMM Laptop RAM Notebook RAM
