Hikvision 8GB DDR4 2666 SODIMM-S1(STD) Laptop Memory – Single Rank DDR4 SDRAM, 2666 MT/S (PC4-21300), 2,666 MHz, CL19 latency, VOLTAGE 1.2V, PIN COUNT-260-pin, Buffered SODIMM Laptop SDRAM, Compatible with systems that take DDR4 2666MT/s SODIMM memory. Speeds up to 3200 MT/s and faster data rates are expected to be available as DDR4 technology matures, Increase bandwidth by up to 32 percent, Reduce Power consumption by up to 40 percent