Kingston ValueRAM 4GB DDR3 SDRAM Memory Module - For Notebook - 4 GB (1 x 4 GB) - DDR3-1600/PC3-12800 DDR3 SDRAM - CL11 - 1.50 V - Non-ECC - Unbuffered - 204-pin - SoDIMM

Up to 1600 MHz speed with CL11 latency for playing the latest games and using heavy software 4 GB memory allows you to have more programs open at a time 204-pin-pin DDR3 SDRAM interface synchronizes electrical and clock signals for an efficient data transfer rate