A-Tech Memory RAM upgrade compatible for select Desktop PC/Computers ^^ 16 GB RAM Kit (4 x 4GB Modules); DDR3 DIMM 240-Pin; Speeds up to 1600 MHz, PC3-12800/PC3-12800U ^^ NON-ECC Unbuffered ( UDIMM ); 1Rx8 or 2Rx8 (Single or Dual Rank); JEDEC standard DDR3 1.5V or DDR3L 1.35V ^^ Expands your system's available Memory RAM resource, improving performance, speed and allowing you to take on more while maintaining a smooth experience ^^ Quick and easy to install, no expertise required (Please refer to your system's manual for seating and channel guidelines) ^^ All A-Tech memory modules undergo stringent quality control testing to ensure dependable and reliable performance ^^ Backed by A-Tech's Limited Lifetime Warranty + Tech Support Team available to help before and after your purchase