Instances›AWS EC2›m8azn›m8azn.12xlarge
Compute
vCPUs48
Memory192 GiB
Mem / vCPU4.00 GiB
ProcessorEPYC 9575F
Clock speedUp to 5 GHz
Architecturex86_64
Storage
TypeEBS only
Bandwidth30,000 Mbps
Throughput3750 MB/s
IOPS120,000
Networking
Performance100 Gigabit
Max ENIs16
IPv6Yes
GPUNone
Family sizes
m8azn.medium1 vCPU · 4 GiB
m8azn.large2 vCPU · 8 GiB
m8azn.xlarge4 vCPU · 16 GiB
m8azn.3xlarge12 vCPU · 48 GiB
m8azn.6xlarge24 vCPU · 96 GiB
m8azn.12xlarge48 vCPU · 192 GiB
m8azn.metal-12xl48 vCPU · 192 GiB
m8azn.24xlarge96 vCPU · 384 GiB
m8azn.metal-24xl96 vCPU · 384 GiB
m8azn.12xlarge

The m8azn.12xlarge pairs 48 vCPU with 192 GiB of RAM, the 4.00 GiB-per-vCPU ratio that marks a general-purpose instance. In the name, "m" is the general-purpose line, "8" is the generation, "azn" marks AMD processors, a higher clock and enhanced networking and "12xlarge" is the size within the m8azn family. It runs on AMD EPYC 9575F at Up to 5 GHz, and AWS introduced it in February 2026. AWS has since shipped m9g; m9g.12xlarge is the direct replacement at this size. Spot's node ladder tops out below this size, so m8azn.12xlarge becomes 3 × gp.vs2.2xlarge (48 vCPU, 192 GiB combined), $4.96/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

m8azn.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.

Pricing by region
1 hr
RegionAWS on-demandAWS Spot1-yr Reserved3-yr ReservedRackspace SpotYou save
US East, N. Virginia$4.955$1.197$0.123
$4.832 savings
US Central, Chicagono AWS region$0.123
US Central, Dallasno AWS region$0.153
Hong Kong$0.033
Sydney, Australia$0.483
London, UK$0.663
US West, San Jose$0.453
US Central, Dallas 2no AWS region$0.003
US East, N. Virginia 2$4.955$1.197$0.453
$4.502 savings
When to use it
Good for
  • ●Small to mid-size relational databases
  • ●Backend services with no single dominant resource
  • ●Queue workers and scheduled jobs
  • ●Workloads that fit inside 192 GiB of RAM
  • ●Parallel work that can occupy 48 vCPU
  • ●Network-heavy services — AWS rates this size at 100 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
  • ●GPU or FPGA acceleration is needed
  • ●Sustained full-core CPU load. A compute-optimized family costs less per unit of work.
  • ●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.
  • ●Local NVMe or instance-store disk is a hard requirement
m8azn.12xlarge runs $3,617/mo on AWS on-demand. The 3-node equivalent on Rackspace Spot: $90/mo.
  • 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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