DDR3L-1600 CL11-11-11 1.35V 4GB (1x4GB) Want to speed up your laptop? G.SKILL SO-DIMM memory is here to help! You will feel the speed upgrade instantly no matter if you are gaming, programming, multimedia editing or just surfing around the web! It is one of the smartest and most cost-effective ways to enhance your productivity and computing experience on your laptop ! The memory kit will boot at the SPD speed when BIOS settings are at default. If XMP is supported, enable XMP/DOCP/A-XMP profile in the BIOS to reach up to the rated XMP overclock speed of the memory kit. For XMP-enabled memory kits, reaching the rated XMP overclock speed and system stability depends on the capability of the motherboard & CPU.