Instances›AWS EC2›m9gd›m9gd.12xlarge
Compute
vCPUs48
Memory192 GiB
Mem / vCPU4.00 GiB
ProcessorGraviton5 Processor
Clock speed3.3 GHz
Architecturearm64
Storage
Type3 × 950 GB NVMe SSD
Bandwidth18,000 Mbps
Throughput2250 MB/s
IOPS72,000
Networking
Performance25 Gigabit
Max ENIs12
IPv6Yes
GPUNone
Family sizes
m9gd.medium1 vCPU · 4 GiB
m9gd.large2 vCPU · 8 GiB
m9gd.xlarge4 vCPU · 16 GiB
m9gd.2xlarge8 vCPU · 32 GiB
m9gd.4xlarge16 vCPU · 64 GiB
m9gd.8xlarge32 vCPU · 128 GiB
m9gd.12xlarge48 vCPU · 192 GiB
m9gd.16xlarge64 vCPU · 256 GiB
m9gd.24xlarge96 vCPU · 384 GiB
m9gd.48xlarge192 vCPU · 768 GiB
m9gd.metal-48xl192 vCPU · 768 GiB
m9gd.12xlarge

The m9gd.12xlarge is a general-purpose AWS EC2 instance: 48 vCPU and 192 GiB of memory, 4.00 GiB per vCPU. In the name, "m" is the general-purpose line, "9" is the generation, "gd" marks AWS Graviton (ARM) processors and local NVMe storage and "12xlarge" is the size within the m9gd family. It runs on AWS Graviton5 Processor at 3.3 GHz, and AWS introduced it in June 2026. m9gd is the current generation of the m family, so there is no newer AWS size to migrate to. No single Spot node covers 48 vCPU and 192 GiB, so the equivalent is a fleet: 3 × gp.vs2.2xlarge, 48 vCPU and 192 GiB in total, $3.02/hr on AWS in US East (N. Virginia), from $0.123/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

m9gd.12xlarge gives you 48 vCPU and 192 GiB in a single machine. The largest comparable Spot node, gp.vs2.2xlarge, is 16 vCPU and 64 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 192 GiB in one process, it does not.

x86_64 onlym9gd.12xlarge is Graviton (arm64) and Rackspace Spot has no arm64 nodes, so you'd be moving to x86. You'll need x86 builds of your images, and per-core speed differs between the chips — worth testing before you decide how many nodes to run.
No local diskm9gd.12xlarge comes with 3 × 950 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$3.017$0.756$0.123
$2.894 savings
US Central, Chicagono AWS region$0.123
US Central, Dallasno AWS region$0.153
Hong Kong$0.033
Sydney, Australia$3.791$0.737$0.483
$3.308 savings
London, UK$0.663
US West, San Jose$0.453
US Central, Dallas 2no AWS region$0.003
US East, N. Virginia 2$3.017$0.756$0.453
$2.564 savings
When to use it
Good for
  • ●Queue workers and scheduled jobs
  • ●Web and application servers with mixed CPU and memory demand
  • ●Microservices and container fleets
  • ●Workloads that fit inside 192 GiB of RAM
  • ●Jobs that want 3 × 950 GB of local NVMe scratch space
  • ●Network-heavy services — AWS rates this size at 25 Gigabit
  • ●Anything that shards cleanly across 3 nodes, which is how it maps onto Rackspace Spot
Avoid if
  • ●The working set needs more than 192 GiB of RAM
  • ●You cannot rebuild x86-only binaries or vendor images for aarch64
  • ●More than 4.00 GiB of RAM per vCPU is needed — that ratio is fixed for the whole family
  • ●The work is single-threaded. Most of these 48 vCPU would sit idle.
  • ●GPU or FPGA acceleration is needed
  • ●Sustained full-core CPU load. A compute-optimized family costs less per unit of work.
Stop overpaying AWS. This compute costs $2,202/mo on AWS vs $90/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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