4GB DDR4 2133Mhz PC4-17000 ECC UNBUFFERED DIMM 1Rx8 1.2V 288Pin Hynix Original Part # HMA451U7MFR8N-TF capacity:4GB Manufacturer Samsung Memory Type DDR4

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

Manufacturer Micron  Memory Type DDR4 Capacity 8GB  Data Transfer Rate 2666Mhz  Bus Type  PC4-21300

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

Manufacturer Heatsink  Memory Type DDR4 Capacity 16GB  Data Transfer Rate 2666MHz  Bus Type PC4-21300

4GB DDR4 2133Mhz PC4-17000 ECC UNBUFFERED DIMM 1Rx8 1.2V 288Pin Hynix Original Part # HMA451U7MFR8N-TF capacity:4GB Manufacturer Samsung Memory Type DDR4Manufacturer Hynix Memory Type DDR4 Capacity 4GB Data Transfer Rate 2133Mhz Bus Type PC4 17000