@KarishmaTiwari-MSFT - this is for a target cluster, which can only be deployed once the initial management cluster has been deployed. The management cluster requires 8GB, your target clusters will require additional memory, directly related to the # and size of Load Balancer, of control planes, and worker nodes.
This is one of the reasons why, for a production deployment, we recommend (https://learn.microsoft.com/en-us/azure-stack/aks-hci/system-requirements#compute-requirements) a physical system with at least 256GB RAM and 16 physical cores, but for evaluation purposes, having 64GB RAM should give you enough headroom to run the Host OS, the management cluster (8GB) and a few small target clusters.