The G.SKILL Ripjaws X Series F3-14900CL9D-8GBXL (3 x 4GB) is a high-performance RAM kit that provides a total capacity of 12GB with each module having a capacity of 4GB. It features ECC memory and is registered, making it ideal for demanding computing tasks. With a sleek design and a weight of only 0.3 pounds, this DDR3 SDRAM RAM kit is a reliable option for enhancing the speed and efficiency of your computer system.