The r7gd.12xlarge is a memory-optimized AWS EC2 instance: 48 vCPU and 384 GiB of memory, 8.00 GiB per vCPU. In the name, "r" stands for RAM, "7" is the generation, "gd" marks AWS Graviton (ARM) processors and local NVMe storage and "12xlarge" is the size within the r7gd family. It runs on AWS Graviton3 Processor at 2.5 GHz, and AWS introduced it in July 2023. AWS has since shipped r8gd and r9gd; r8gd.12xlarge is the direct replacement at this size. No single Spot node covers 48 vCPU and 384 GiB, so the equivalent is a fleet: 3 × mh.vs1.2xlarge, 48 vCPU and 384 GiB in total, $3.27/hr on AWS in US East (N. Virginia), from $0.063/hr on Rackspace Spot. Spot delivers compute as managed Kubernetes, so a node pool of that size is the native shape of the answer rather than a workaround — provided the workload scales horizontally.
| Region | AWS on-demand | AWS Spot | 1-yr Reserved | 3-yr Reserved | Rackspace Spot | You save |
|---|---|---|---|---|---|---|
| US East, N. Virginia | $3.266 | $1.550 | $2.053 | $1.411 | $0.063 | $3.203 savings |
| US Central, Chicago | no AWS region | $0.063 | ||||
| US Central, Dallas | no AWS region | $0.393 | ||||
| Hong Kong | $3.969 | $2.501 | $1.715 | $0.063 | $3.906 savings | |
| Sydney, Australia | $3.758 | $0.877 | $2.368 | $1.624 | $0.063 | $3.695 savings |
| London, UK | $3.833 | $0.392 | $2.415 | $1.656 | $0.393 | $3.440 savings |
| US West, San Jose | $3.674 | $0.987 | $2.315 | $1.587 | $0.006 | $3.668 savings |
| US Central, Dallas 2 | no AWS region | $0.726 |