ddr4 2666mhz

Lenovo 16GB DDR4 SDRAM Memory Module - For Notebook - 16 GB - DDR4-3200/PC4-25600 DDR4 SDRAM - 3200 MHz - Non-ECC - Unbuffered - 260-pin - SoDIMM - 36

HPE 16GB DDR5 SDRAM Memory Module - For Server, Rack Server, Blade Server - 16 GB (1 x 16GB) - DDR5-4800/PC5-38400 DDR5 SDRAM - 4800 MHz Single-rank