Kingston HyperX impact, 2x8Gb DDR3-1600/PCL3-12800 sodimm 1.35v

Frequency: 1600MHz Form Factor: SODIMM Voltage: 1.35V Number of pins: 204Pin Sodimm Type: DDR3 Bus speed: PC3L-12800 (DDR3-1600) Packet content: Total capacity: 8GB The value of CL: CL11 Number of modules: 1 piece Quality: high quality Capacity per module: 8GB The hyperx impact series has xmp profile firmware onboard to automatically adjust xmp profile to maximise connection speed when installed. Good when used in a laptop or device that does not have xmp ram options in Bios. Just to point out, these matching pair are over $130 new. I virtually used them for a few hours before deciding to sell the NAS. Price is firm!