Hynix 4GB (1 x 4GB) 260-Pin PC4-17000 DDR4-2133 Sodimm HMA451S6AFR8N-TF 1 x 4GB DDR4-2133 PC4-17000 260-Pin Sodimm 1.2v Single Rank (1Rx8) 2133MHz CL15 Temperature sensor with integrated SPD This product is in compliance with the RoHS directive