Today, AWS announced the availability of next-generation General Purpose gp3 storage volumes for Amazon Relational Database Service (Amazon RDS) Custom for Oracle and Amazon RDS Custom for SQL Server. Amazon RDS gp3 volumes give you the flexibility to provision storage performance independently of storage capacity, paying only for the resources you need. You can choose gp3 storage type for your Amazon RDS Custom database instance with the ability to select from 40 GiB to 64 TiB (20 GiB to 16 TiB for Amazon RDS Custom SQL Server) of storage capacity, with a baseline storage performance of 12,000 IOPS (3,000 IOPS for Amazon RDS Custom SQL Server) included with the price of storage. For workloads that need even more performance, you can scale up to 64,000 IOPS (16,000 IOPS for Amazon RDS Custom SQL Server) for an additional cost.
Source:: Amazon AWS