Compatible upgrades: Dell One 2020 Module Size: 4GB (4GBx1) Package: 204-pin SoDIMM Feature: DDR3 PC3-12800 Specs: DDR3 PC3-1600MHZ 2rx8 1.5v lifetime warranty Pictures are for reference only but you will receive major brands such as: Hynix, Micron, Samsung, Elpida, etc. Maximum Memory: 8 GB Expansions: 2 SOCKET Important: MODULES MUST BE ORDERED AND INSTALLED IN PAIRS for Dual Channel mode. If 4GB is installed, the recognized memory may be reduced to 3.5GB or less (depending on system configuration and memory allocation). A 64-bit Operating System is required to utilize more than 4GB of memory.