HP 4GB 1600MHZ DDR3L 1DM 1040 - 4 GB - DDR3-1600/PC3-12800 DDR3 SDRAM - 1600 MHz - DIMM
CTO 8GB 1D+4GB
Technical Specifications:
Memory Size: 4 GBMemory Technology: DDR3 SDRAMMemory Speed: 1600 MHzMemory Standard: DDR3-1600/PC3-12800Form Factor: DIMM