Upgrade your RAM now. Expanding the memory in your PC or Mac typically provides the greatest performance boost. The DDR4-2666 U-DIMM (Branded) from Transcend has been built to the highest specifications using the best available chips and components, and has undergone rigorous lab testing to ensure full compatibility with Intel Coffee Lake and AMD Ryzen processors. Each memory module has a rated speed of 2666 Mbps, significantly enhancing data transfer efficiency with a higher bandwidth of up to 21 GB/s. The Transcend DDR4-2666 U-DIMM module operates at a nominal voltage of just 1.2 V, ensuring that both the operating temperature and the electrical load on the memory controller are reduced, leading to greater energy savings.