AWS Graviton3-based M7g and R7g database instances are now generally available for Amazon Relational Database Service (RDS). Graviton3-based instances provide up to a 30% performance improvement and up to a 27% price/performance improvement over Graviton2-based instances on RDS for open-source databases depending on database engine, version, and workload. You can launch these database instances when using Amazon RDS for MySQL, Amazon RDS for PostgreSQL, and Amazon RDS for MariaDB.
Source:: Amazon AWS