The g5.48xlarge pairs 192 vCPU with 768 GiB of RAM, the 4.00 GiB-per-vCPU ratio that marks a GPU instance. In the name, "g" is graphics, "5" is the generation and "48xlarge" is the size within the g5 family. It runs on AMD EPYC 7R32 at 2.8 GHz, and AWS introduced it in November 2021. AWS has since shipped g6 and g7; g6.48xlarge is the direct replacement at this size, scoring 3,842,690 CoreMark/s against this instance's 3,614,458 — roughly 6% more throughput for the same vCPU count. Rackspace Spot has no equivalent to offer: 8 × NVIDIA A10G wired together behind a high-speed interconnect is one tightly coupled machine, not 8 independent nodes — and that interconnect is usually what the instance was bought for. Spot's largest VM tops out at 16 vCPU and 128 GiB, and even that is not the missing piece here. The table below prices what AWS charges; the honest answer on the Spot side is that this workload stays where it is.
| Region | AWS on-demand | AWS Spot | 1-yr Reserved | 3-yr Reserved | Rackspace Spot | You save |
|---|---|---|---|---|---|---|
| US East, N. Virginia | $16.288 | $5.162 | $10.261 | $7.036 | ||
| US Central, Chicago | no AWS region | |||||
| US Central, Dallas | no AWS region | |||||
| Hong Kong | $25.076 | $15.798 | $10.833 | |||
| Sydney, Australia | $21.178 | $21.178 | $13.342 | $9.149 | ||
| London, UK | $20.676 | $20.676 | $13.026 | $8.932 | ||
| US West, San Jose | ||||||
| US Central, Dallas 2 | no AWS region | |||||
| US East, N. Virginia 2 | $16.288 | $5.162 | $10.261 | $7.036 |