db.r6i.8xlarge is an Amazon Neptune size with 32 vCPUs, 256 GiB memory (Intel Xeon Family). In US East (N. Virginia) it costs $5.568 per hour on demand ($4,064.64 per month) for Standard storage. It is sold in 29 regions.
Prices by region
USD per hour, Standard storage. Reserved prices are no upfront, standard. Cheapest on-demand first.