db.x2g.8xlarge is an Amazon Neptune size with 32 vCPUs, 512 GiB memory (AWS Graviton2). In US East (N. Virginia) it costs $8.755 per hour on demand ($6,390.86 per month) for Standard storage. It is sold in 4 regions.
Prices by region
USD per hour, Standard storage. Reserved prices are no upfront, standard. Cheapest on-demand first.