Crucial 4GB DDR3 SDRAM Memory Module - For Desktop PC - 4 GB - DDR3-1600/PC3-12800 DDR3 SDRAM - 1600 MHz - CL11 - Non-ECC - Unbuffered - 204-pin - SoDIMM

Up to 1600 MHz speed with Unbuffered signal for smooth computer performance SoDIMM 4 GB of memory to refine your computers performance DDR3-1600/PC3-12800 interface synchronizes electrical and clock signals for an efficient data transfer rate