 "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 - DDR4 4 GB DIMM 288-pin" " Crucial 288-pin CT4G4RFS8213 Server Memory CDWG.com
"More speed. More bandwidth. More efficient. Next generation DDR4 memory is here.Overcome one of your greatest server limitations: memory. From networking, cloud computing, and virtualization to HPC, Big Data and more, memory - dependent server applications require increasingly higher densities of memory and higher levels of performance than are attainable on current DDR3 technology. Enter Crucial DDR4 server memory.This product is a 4GB DDR4 server module that operates at speeds up to 2133 MT/s and has a CL15 latency. It is a Registerred DIMM (RDIMM) with Error Correction Code (ECC). It conforms to the industry standard DDR4 RDIMM layout of 288 pins and is compatible with systems that take DDR4 2133MT/s RDIMM memory." 