4GB DDR3 1333Mhz PC3L-10600 ECC RDIMM 1Rx4 1.35V 240pin Vlp/Samsung Original Part # M392B5270DH0-YH9 DDR5-SODIMM-Laptop RAM Manufacturer Elpida Memory Type DDR3

Manufacturer Elpida  Memory Type DDR3 Capacity 8GB  Data Transfer Rate 1066Mhz  Bus Type PC3-8500

Manufacturer Micron  Memory Type DDR3

Manufacturer Sumsung Memory Type DDR4 Capacity 16GB Data Transfer Rate 2133Mhz Bus Type PC4-17000

Manufacturer Elpida Memory Type DDR3 Capacity 4GB Data Transfer Rate 1600Mhz Bus Type PC3-12800

Manufacturer Hynix Memory Type DDR4 Capacity 8GB  Data Transfer Rate 2933MHz  Bus Type PC4-23400

4GB DDR3 1333Mhz PC3L-10600 ECC RDIMM 1Rx4 1.35V 240pin Vlp/Samsung Original Part # M392B5270DH0-YH9 DDR5-SODIMM-Laptop RAM Manufacturer Elpida Memory Type DDR3Manufacturer Samsung Memory Type DDR3 Capacity 4GB Data Transfer Rate 1333Mhz Bus Type PC3L 10600