 "Crucial - DDR4 8 GB DIMM 288-pin" " Crucial 288-pin CT8G4DFD824A System Memory (RAM) CDW.com
"Increase your desktop's multitasking abilities with the Crucial RAM. This unbuffered DDR4 SDRAM operates at a voltage of 1.2 volts for energy-efficient performance. It is compatible with motherboards having 288-pin DIMM slots and DDR4-enabled chipset. With a CAS latency of CL17, the system memory minimizes delay and ensures faster loading of applications.Dual-rank 8 GB RAM with enhanced bandwidth to handle more data at onceMemory speed 2400 MHz for fast data transfer" 
 "Crucial 4GB (1x4GB) 2133MHz DDR4 ECC RDIMM 1.2v "@en 1x4GB | CT4G4RFS8213 Novatech"@en
"2133MHz RAM Speed, CL15, ECC, Registered, 1.2v VDIMM, Lifetime Warranty"@en 
 Memory Type DDR4 (PC4-17000) Capacity 4GB (1 x 4GB) Tested Speed 2133MHz Tested Latency CL15 Tested Voltage 1.2v Registered / Unbuffered Registered Error Checking ECC Memory Features N/A