 "Crucial - DDR4 8 GB DIMM 288-pin" " Crucial 288-pin CT8G4DFS8213 System Memory (RAM) CDW.com
"Load applications faster and run demanding programs without lag. Crucial memory debuts faster. Even better, as its memory technology matures, speeds are projected to be amazingly high." 
 "Samsung - DDR4 8 GB DIMM 288-pin" " Samsung 288-pin M393A1G40DB0-CPB System Memory (RAM) CDW.com
"Samsung DDR4 is an optimized solution for highly virtualized environments, high-performance computing and networking.Achieving bandwidth speeds up to 3.2Gbps, Samsung DDR4 delivers higher performance at a higher speed than both DDR2 and DDR3. Compared to DDR3L (low power DDR3), Samsung DDR4 shows an overall improvement in performance in every DIMM and a performance that is more than 40 percent better at 1 DIMM per channel.A major decrease in voltage and the improved I/O power efficiency of DDR4 synchronous dynamic RAM (SDRAM) translates into significant cost savings. According to Samsung internal testing, DDR4 boasts a continuous working voltage of 1.2 V, a voltage that is 11 percent lower than the 1.35 V consumed by DDR3L. By adopting POD (Pseudo Open Drain) for data transmission, Samsung DDR4's input/output (I/O) power consumption is reduced by 50 percent compared to the previously-used SSTL (Stub Series Terminated Logic) of DDR3L. Overall, Samsung DDR4 shows a Performance/watt level more than 20 percent higher than DDR3L." 