Samsung is about to squeeze 128GB into a single DDR4 RAM module (2023)
128GB Kit (4 x 32GB) PC4-21300 RAM for Apple iMac 2020 - 27 Inch Retina 5K
Is a 128 Gb memory stick just made up of two 64 Gb chips 'glued' together or is it an entirely different technology that suddenly occupies half the space? - Quora