Buy Kingston KF318LS11IB/4 4GB DDR3 Memory Module Product Name: Kingston FURY Impact DDR3 Memory Memory Type: DDR3 SDRAM Capacity: 4 GB (1 x 4 GB module) Speed: 1866 MHz (DDR3-1866/PC3L-14900) Form Factor: SoDIMM (204-pin) Latency: CL11 Voltage: 1.35 V (Low voltage for energy efficiency) Compatibility: Designed for notebooks Warranty: Lifetime warranty for peace of mind