Amazon Neptune now supports the db.r5.24xlarge instance type
You can now launch your Amazon Neptune RDF/SPARQL or Apache TinkerPop graph application with a db.r5.24xlarge instance type for improved loading performance in all regions where Amazon Neptune is available.
The R5 instance family is based on the AWS Nitro System, a combination of dedicated hardware and lightweight hypervisor that delivers practically all the compute and memory resources of the host hardware to your database instance. With a 1:8 vCPU to memory ratio, the db.r5.24xlarge provides up to 768 GiB of memory and 25 Gbps of network bandwidth to perform resource intensive operations such as bulk loading graph data.
You can create a new Neptune database with the db.r5.24xlarge instance type, or modify your existing database cluster to scale up to the new instance type using the AWS Management Console, AWS SDK or CLI. Please refer to the Amazon Neptune User Guide and the Neptune pricing page for more details and regional availability.