The Corsair Vengeance LP 8GB (2x4GB) DDR3-1600 CL9 CML8GX3M2A1600C9 is a set of two 4GB DDR3 modules, totaling 8GB of memory. These modules have a bus speed of PC3-12800 (DDR3-1600) and a memory type of DDR3 SDRAM. They are designed for low profile systems and come with a model of Corsair Vengeance LP, known for their reliability and performance in gaming and other intensive applications. With a total capacity of 8GB and a capacity per module of 4GB, this lot of 16 modules is a great upgrade for boosting the performance and speed of your computer.