8GB DDR3 1866Mhz PC3-14900 ECC RDIMM 2Rx4 1.5V 240pin Samsung Original Part # M393B1K70QB0-CMA DDR5-SODIMM-Laptop RAM Manufacturer Kingston Memory Type DDR4

Manufacturer Kingston  Memory Type DDR4 Capacity 4GB  Data Transfer Rate 2666Mhz  Bus Type PC4-21300

Manufacturer Kingston Memory Type DDR4 Capacity 256GB Data Transfer Rate 2933Mhz Bus Type PC4-23400

Manufacturer Hynix Memory Type DDR3 Capacity 8GB Data Transfer Rate 1333Mhz Bus Type PC3L-10600

Manufacturer Micron  Memory Type DDR4 Capacity 8GB  Data Transfer Rate 2133Mhz  Bus Type PC4-17000

8GB DDR3 1866Mhz PC3-14900 ECC RDIMM 2Rx4 1.5V 240pin Samsung Original Part # M393B1K70QB0-CMA DDR5-SODIMM-Laptop RAM Manufacturer Kingston Memory Type DDR4Manufacturer Samsung Memory Type DDR3 Capacity 8GB Data Transfer Rate 1866Mhz Bus Type PC3 14900