8GB DDR4 2933 MHz RDIMM Module Lenovo Compatible Form Factor_3.5" Internal HDD they can be used for

they can be used for other work independently of Upgradeable

Samsung Proprietary REX

Create three separate daisy chains of devices – even bus powered - and remove devices from one chain without affecting the other chains

GC (Garbage Collection)

Using RAID 5 in the past meant giving up precious capacity and taking a big hit on performance

8GB DDR4 2933 MHz RDIMM Module Lenovo Compatible Form Factor_3.5" Internal HDD they can be used forCapacity: 8GB Module or Kit: Module RAM Type: RDIMM Brand: Samsung Pins: 288 PIN Clock Speed: 2933 MHz Data rate: PC4 23400 CAS: 21. 0 Voltage: 1. 2 ECC: ECC Registered or Buffered: Registered Warranty: Lifetime