The first generation memory optimized instances are designed to deliver fast performance for workloads that process large data sets in memory. The Series B instances are well-suited for High-performance databases, enhanced networking, latency-sensitive workloads, and other enterprise applications. You can select the Memory Intensive plans ranging from 6GB to up to 240GB of dedicated RAM. Now we have come up with the 2nd generation Memory Intensive computing node that is designed for applications such as high-performance databases, distributed in-memory caches, in-memory databases, and big data analytics. The Series M plans are designed to offer double the amount of vCPUs and more than triple the amount of RAM at the same price compared to the first generation.