4GB, 204-pin SODIMM, DDR3 PC3-12800, Description CT51264BF160B is a single 4GB DDR3/DDR3L ( Both are same item )Notebook module that operates at speeds up to 1600 MT/s and has a CL11 latency. It is dual voltage and can operate at 1.35V or 1.5V. It is Unbuffered and is non-ECC. It conforms to the industry standard SODIMM layout of 204 pins and is compatible with computers that take DDR3 SODIMM memory. Features: 204-pin SODIMM DDR3-1600 Product Details: Brand: Crucial Computer Memory Size: 4 GB RAM Memory Technology: SODIMM^NON-ECC Memory Speed: 1600 MHz Compatible Devices: Laptop RAM: ‎4 GB SODIMM^NON-ECC Memory Speed: ‎1600 MHz Hard Drive: ‎4 GB Brand: ‎Crucial Series: ‎Crucial DDR3/DDR3L 1600 MT/s SODIMM Memory Item model number: ‎CT51264BF160B Item Weight: ‎0.317 ounces Product Dimensions: ‎6.87 x 0.74 x 2.13 inches Item Dimensions LxWxH: ‎6.87 x 0.74 x 2.13 inches Color: ‎Multicolor Number of Processors: ‎1 Computer Memory Type: ‎DDR3 SDRAM Flash Memory Size: ‎4 Voltage: ‎1.35 Volts Department: ‎memory Manufacturer: ‎CRUCIAL TECHNOLOGY Is Discontinued By Manufacturer: ‎No Date First Available: ‎December 5, 2011