The Crucial Ballistix Sport 8GB Kit (2x4GB) DDR3-1600 UDIMM is a set of two 4GB memory modules designed for high performance computing. With a bus speed of PC3L-12800 (DDR3L-1600) and a low profile design, these modules are ideal for those looking for a reliable and efficient memory upgrade. The Crucial brand is known for its quality and durability, making this product a great choice for those seeking a seamless and successful computing experience.brand new and package never installed. guaranteed non-DOA