Memory modules ddr3 ram 1333mhz 2gb for laptop computer b Memory channels: dual Memory socket: so dimm Memory cas latency: 4-4-4-12 Memory timing:4-4-4-12 Pins:200 Voltage:1.5v Function: non ecc memory Chips: hynix. Elpida. Micron. Samgsung. Infineon Retail plastic blister packing or package(50 pcs/box).