Now upgrade your RAM. An extension of the main memory in your PC or Mac normally brings in the highest enhancement in performance!DDR4-2666 U-DIMM (JETRAM)transcend's JetRam memory modules are manufactured with carefully tested (ETT-grade) branded DRAM chips that have passed transcend's stringent quality controls and testing procedures. The modules offer excellent compatibility and fully tested reliability, ideal for PC upgrades at an attractive price. Each memory module is designed to 2666 Mbps to maximize data transfer efficiency through higher bandwidth of up to 21GB/s. Transcend's DDR4 U-DIMM JetRam memory modules run at a nominal voltage of only 1.2V, so that both the operating temperature and the electrical load of the storage controller can be reduced. Compared to standard DDR3 modules with 1.5V, this saves up to 40 percent energy.This text is machine translated.