CT4K8G4RFS4213 is a 32GB Kit consisting (4) 8GB DDR4 server modules that operates at speeds up to 2133 MT/s and has a CL15 latency. It is a Registered 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.