db.m8a.24xlarge is an AWS RDS size with 96 vCPUs, 384 GiB memory (5th Generation AMD EPYC). In US East (N. Virginia) it costs $10.315 per hour on demand ($7,530.10 per month) for PostgreSQL, Single-AZ; a 1-year Database Savings Plan costs $8.252 per hour, 20% less. It is sold in 9 regions.
Prices by region
USD per hour, PostgreSQL, Single-AZ. Reserved prices are no upfront, standard. Cheapest on-demand first.