TRANSCEND DIMM DDR4 4GB 2133MHz 1Rx8 CL15

Designed for high-end desktop PCs, Transcend's DDR4 U-DIMM memory modules are fully compatible with Intel® Haswell-E CPU with X99 chipset. Each module is constructed with top quality DRAM chips and rated at 2133MHz, translating into data transmission rates of up to 17GB/s. Operated at a nominal voltage of just 1.2V, Transcend's DDR4 U-DIMMs reduce electrical load on the memory controller, consuming up to 40% less power compared to standard 1.5V DDR3 DIMMs.

https://www.transcend-info.com/Products/No-684