4GB DDR3 Laptop Memory RAM Module | Single Stick of 4GB DDR3 1600MHz PC3L-12800 Non ECC Unbuffered DIMM (Non ECC UDIMM) 204-pin Genuine Samsung Brand | Backed By A Lifetime Warranty | Free United States Based Technical Support Designed For Easy Installation And Maximum Compatibility With Select DDR3 Laptops. All Modules Undergo Quality Assurance Testing To Ensure Dependable and Reliable Performance Increase bandwidth by up to 30 percent Reduce Power consumption by up to 40 percent and extend battery life Faster burst access speeds for improved sequential data throughput Optimized for next generation processors and platforms More Speed-Load applications faster and run demanding programs without lag.