More speed. More bandwidth. More efficient. In the ever-changing world of technology, any component more than half a decade old is usually in need of an update. At seven years old & counting, that's exactly the state DDR3 memory is in: computers can only do so much with it. Since the introduction of DDR3 memory technology in 2007, processors have doubled in capability, SSDs have revolutionized throughput, & graphics cards have drastically increased frame rates, leaving memory as a limiting factor. With Crucial DDR4 Desktop Memory, crush the DDR3 memory bottleneck & unlock a new standard of performance. CT2K8G4DFS8213 is a 16GB Kit consisting of (2) 8GB DDR4 desktop modules that operates at speeds up to 2133 MT/s & has a CL15 latency. It is an Unbuffered DIMM. It conforms to the industry standard DDR4 ECC UDIMM layout of 288 pins & is compatible with systems that take DDR4 2133MT/s UDIMM memory.