This lot of memory modules is specifically designed for use in servers and other high-performance computing systems. With a total of 16GB of memory spread across four 4GB modules, this set offers plenty of capacity for demanding applications and workloads.Each module is designed with ECC memory features to ensure maximum stability and reliability, even under heavy use. And with a bus speed of PC2-5300 (DDR2-667), you can expect fast and efficient performance in even the most demanding computing environments. Whether you're building a new server or upgrading an existing system, these memory modules are an excellent choice for anyone who needs top-of-the-line performance and reliability.kh