Instances›AWS EC2›i7i›i7i.12xlarge
Compute
vCPUs48
Memory384 GiB
Mem / vCPU8.00 GiB
ProcessorXeon Scalable
Clock speed3.2 GHz
Architecturex86_64
Storage
Type3 × 3,750 GB NVMe SSD
Bandwidth15,000 Mbps
Throughput1875 MB/s
IOPS60,000
Networking
PerformanceUp to 28 Gigabit
Max ENIs8
IPv6Yes
GPUNone
Family sizes
i7i.large2 vCPU · 16 GiB
i7i.xlarge4 vCPU · 32 GiB
i7i.2xlarge8 vCPU · 64 GiB
i7i.4xlarge16 vCPU · 128 GiB
i7i.8xlarge32 vCPU · 256 GiB
i7i.12xlarge48 vCPU · 384 GiB
i7i.16xlarge64 vCPU · 512 GiB
i7i.24xlarge96 vCPU · 768 GiB
i7i.metal-24xl96 vCPU · 768 GiB
i7i.48xlarge192 vCPU · 1536 GiB
i7i.metal-48xl192 vCPU · 1536 GiB
i7i.12xlarge

The i7i.12xlarge pairs 48 vCPU with 384 GiB of RAM, the 8.00 GiB-per-vCPU ratio that marks a storage-optimized instance. In the name, "i" is I/O, meaning local storage, "7" is the generation, "i" marks Intel processors and "12xlarge" is the size within the i7i family. It runs on Intel Xeon Scalable (Emerald Rapids) at 3.2 GHz, and AWS introduced it in April 2025. AWS has since shipped i8g; i8g.12xlarge is the direct replacement at this size, scoring 1,442,199 CoreMark/s against this instance's 1,053,402 — roughly 37% more throughput for the same vCPU count. Spot's node ladder tops out below this size, so i7i.12xlarge becomes 3 × mh.vs1.2xlarge (48 vCPU, 384 GiB combined), $4.53/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.

Match qualityScale-out match

i7i.12xlarge gives you 48 vCPU and 384 GiB in a single machine. The largest comparable Spot node, mh.vs1.2xlarge, is 16 vCPU and 128 GiB, so the equivalent here is 3 nodes rather than one.

Spot runs as managed Kubernetes, so a 3-node pool is the normal way to run things rather than a workaround. If your workload already sits behind a load balancer, a queue or a scheduler, it spreads across them without changes. If it needs all 48 cores and 384 GiB in one process, it does not.

No local diski7i.12xlarge comes with 3 × 3,750 GB NVMe SSD attached to the machine. Spot nodes use network storage only, so that disk doesn't come with it. If you were using it as fast scratch space, you'd move to a persistent volume or object storage, which are slower to read.
Pricing by region
1 hr
RegionAWS on-demandAWS Spot1-yr Reserved3-yr ReservedRackspace SpotYou save
US East, N. Virginia$4.530$1.621$0.063
$4.467 savings
US Central, Chicagono AWS region$0.063
US Central, Dallasno AWS region$0.393
Hong Kong$5.982$0.063
$5.919 savings
Sydney, Australia$5.431$1.032$0.063
$5.368 savings
London, UK$5.256$1.250$0.393
$4.863 savings
US West, San Jose$4.995$1.427$0.006
$4.989 savings
US Central, Dallas 2no AWS region$0.726
When to use it
Good for
  • ●Transactional databases with heavy random I/O
  • ●Streaming ingest that spools to local disk
  • ●Elasticsearch and OpenSearch data nodes
  • ●Workloads that fit inside 384 GiB of RAM
  • ●Jobs that want 3 × 3,750 GB of local NVMe scratch space
  • ●Network-heavy services — AWS rates this size at Up to 28 Gigabit
  • ●Anything that shards cleanly across 3 nodes, which is how it maps onto Rackspace Spot
Avoid if
  • ●The working set needs more than 384 GiB of RAM
  • ●The work is single-threaded. Most of these 48 vCPU would sit idle.
  • ●GPU or FPGA acceleration is needed
  • ●Workloads that never touch local disk. The instance-store premium is wasted.
  • ●More than 8.00 GiB of RAM per vCPU is needed — that ratio is fixed for the whole family
Stop overpaying AWS. This compute costs $3,307/mo on AWS vs $46/mo on Rackspace Spot.
  • Spot sells spare capacity at market prices. It is the cheapest compute on the internet.
  • Prices are set by supply and demand. You pay what the market decides.
  • Compute is delivered as fully managed Kubernetes. All infrastructure is taken care of.
  • Egress costs $0.01/GB after the free allowance. AWS charges $0.09/GB.
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