4GB DDR4 2133Mhz PC4-17000 ECC UNBUFFERED DIMM 1Rx8 1.2V 288Pin Micron Original Part # MTA9ASF51272AZ-2G1A1 capacity:4GB Manufacturer Lenovo Memory Type DDR4

Manufacturer Lenovo Memory Type DDR4 Capacity 64GB Data Transfer Rate 2666Mhz Bus Type PC4-21300

Manufacturer Samsung  Memory Type DDR4 Capacity 8GB  Data Transfer Rate 2400Mhz  Bus Type PC4-19200

Manufacturer Micron  Memory Type DDR5 Capacity 64GB  Data Transfer Rate 5600Mhz Bus Type PC5-44800

Manufacturer Micron Memory Type DDR4 Capacity 64GB Data Transfer Rate 2933Mhz Bus Type  PC4-23400

Manufacturer Micron Memory Type DDR4 Capacity 32GB Data Transfer Rate 3200MHz Bus Type  PC4-25600

4GB DDR4 2133Mhz PC4-17000 ECC UNBUFFERED DIMM 1Rx8 1.2V 288Pin Micron Original Part # MTA9ASF51272AZ-2G1A1 capacity:4GB Manufacturer Lenovo Memory Type DDR4Manufacturer Micron Memory Type DDR4 Capacity 4GB Data Transfer Rate 2133Mhz Bus Type PC4 17000