4GB DDR4 2666MHz PC4-21300 SODIMM 1Rx16 1.2V 260pin Crucial Original Part # DDR5-SODIMM-Laptop RAM Manufacturer Crucial Memory Type DDR3

Manufacturer Crucial  Memory Type DDR3 Capacity 16GB  Data Transfer Rate 1066Mhz  Bus Type PC3-8500

Manufacturer Samsung Memory Type DDR3 Capacity 4GB Data Transfer Rate 1066Mhz Bus Type  PC3-8500

Manufacturer Sumsung Memory Type DDR4 Capacity 16GB Data Transfer Rate 2400Mhz Bus Type PC4-19200

Manufacturer Micron  Memory Type DDR4 Capacity 4GB  Data Transfer Rate 3200MHz  Bus Type PC4-25600

Manufacturer Ramaxel  Memory Type DDR4 Capacity 4GB  Data Transfer Rate 2133MHz  Bus Type  PC4-17000

4GB DDR4 2666MHz PC4-21300 SODIMM 1Rx16 1.2V 260pin Crucial Original Part # DDR5-SODIMM-Laptop RAM Manufacturer Crucial Memory Type DDR3Manufacturer Crucial Memory Type DDR4 Capacity 4GB Data Transfer Rate 2666MHz Bus Type PC4 21300