Samsung original RAM 4 GB DDR4 at 2666MHz Micron original RAM 4 GB DDR3 at 1600MHz Samsung RAM 4 GB DDR3 at 1600MHz (2) Micron original RAM 2 GB DDR3 at 1600MHz All information has been explained in the advertisement pictures You can get the information by clicking on the pictures above I removed them from the devices while they were working and clean And if there is any defect or anything, God forbid The matters are easy and simple The most important thing is satisfaction between the two parties Sale to the highest bidder