Intel Optane Memory is designed to accelerate the storage subsystem on compatible machines, to improve transfer speeds and reduce latency. It is among the first products to leverage 3D XPoint memory technology, which offers may of the same properties as NAND flash memory, but with much higher endurance, and performance that’s closer to DRAM….

Source: Hot Hardware – Intel Optane Memory With 3D XPoint Review: Easy, Robust PC Acceleration