Instances›AWS EC2›m8azn›m8azn.metal-12xl
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.metal-12xl

The m8azn.metal-12xl 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 "metal-12xl" 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. Spot's node ladder tops out below this size, so m8azn.metal-12xl 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 qualityVirtualised, not bare metal

m8azn.metal-12xl is a full physical server — no virtualisation layer in the way, direct access to the hardware, and a socket count that licensing can verify.

Rackspace Spot no longer sells bare metal; everything in the catalog is a virtual machine. You get the same cores and memory (3 × gp.vs2.2xlarge, 48 vCPU, 192 GiB), but not the dedicated hardware. If you picked m8azn.metal-12xl because you needed the real machine — nested virtualisation, per-socket licensing, low-level profiling — this is not a replacement at any price. If you picked it because it is the biggest m8azn, it is the same compute for a lot less.

Runs as a fleetNo single Spot node has 48 vCPU; the largest comparable one has 16. So this runs as 3 nodes. That works if your workload already spreads across machines, and doesn't if one process needs all the cores together.
Pricing by region
1 hr
RegionAWS on-demandAWS Spot1-yr Reserved3-yr ReservedRackspace SpotYou save
US East, N. Virginia$4.955$1.238$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$1.238$0.453
$4.502 savings
When to use it
Good for
  • ●Backend services with no single dominant resource
  • ●Queue workers and scheduled jobs
  • ●Web and application servers with mixed CPU and memory demand
  • ●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
  • ●You need dedicated hardware. Rackspace Spot sells virtualised compute only.
  • ●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
  • ●GPU or FPGA acceleration is needed
$3,617/mo on AWS on-demand against $90/mo on Rackspace Spot for the 3-node equivalent — market-priced, not list-priced.
  • 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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