The Crucial Pro 64GB DDR4-3200 RAM kit includes 4×16GB modules, providing a total capacity of 64GB. These UDIMM modules are designed for high performance with a bus speed of DDR4-3200). Crucial is known for their reliable memory products, and this DDR4 SDRAM kit is no exception, featuring ECC memory for error correction. The manufacturer offers a lifetime warranty, making it a dependable choice for upgrading your computer's memory capacity.