Built to exacting specifications with the finest chips and components available, Transcend DDR4-2666 U-DIMM memory modules undergo rigorous laboratory testing to be fully compatible with Intel® Coffee Lake and AMD Ryzen™ processors. Each memory module is rated at 2666 Mbps to greatly increase data transmission efficiency by higher bandwidth of up to 21GB/s. Operated at a nominal voltage of just 1.2V, Transcend's DDR4-2666 U-DIMM ensures that both operating temperature and electrical load on the memory controller can be reduced in order to save more energy.