4GB DDR4-2133MHZ Unbuffered
IM Sourcing Part# HMA451S6AFR8N-TF
RAM Modules – RAM Module - 1.20 V Memory Voltage - DDR4-2133/PC4-17000 - DDR4 SDRAM - CL15 - 4 GB Memory Size - SoDIMM - 2133 MHz Memory Speed - Notebook - Non-ECC - 260-pin Pins - Unbuffered - 1 x 4GB Modules
16GB DDR4 2133 ECC-So-DIMM 2RX8
Transcend Part# TS512MLK72V6H
RAM Modules – TAA Compliant – RAM Module - 1.50 V Memory Voltage - DDR3 SDRAM - CL11 - 4 GB Memory Size - DIMM - 1600 MHz Memory Speed - ECC - 240-pin Pins - Unbuffered - Taiwan - 1.2" Width - 5.3" Length - 50 mil Thickness