Transcend 16GB DDR4 2666Mhz U-DIMM Desktop RAM can boost your system's performance very effectively. It has CL19 CAS Latency and 288-Pin. Transcend's JetRam memory modules are manufactured with true ETT grade, brand-name DRAM chips that have passed Transcend's strict screening process and rigorous environmental testing. The modules provide excellent compatibility and fully-tested reliability, which is ideal for PC upgrade at an attractive price. 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 U-DIMM JetRam memory ensures that both operating temperature and electrical load on the memory controller can be reduced in order to save up to 40% of energy compared to standard DDR3 modules offering 1.5V. It has a Lifetime Warranty