Instances›AWS EC2›m8i›m8i.48xlarge
Compute
vCPUs192
Memory768 GiB
Mem / vCPU4.00 GiB
ProcessorXeon Scalable
Clock speed3.9 GHz
Architecturex86_64
Storage
TypeEBS only
Bandwidth60,000 Mbps
Throughput7500 MB/s
IOPS240,000
Networking
Performance75 Gigabit
Max ENIs24
IPv6Yes
GPUNone
Family sizes
m8i.large2 vCPU · 8 GiB
m8i.xlarge4 vCPU · 16 GiB
m8i.2xlarge8 vCPU · 32 GiB
m8i.4xlarge16 vCPU · 64 GiB
m8i.8xlarge32 vCPU · 128 GiB
m8i.12xlarge48 vCPU · 192 GiB
m8i.16xlarge64 vCPU · 256 GiB
m8i.24xlarge96 vCPU · 384 GiB
m8i.32xlarge128 vCPU · 512 GiB
m8i.48xlarge192 vCPU · 768 GiB
m8i.metal-48xl192 vCPU · 768 GiB
m8i.96xlarge384 vCPU · 1536 GiB
m8i.metal-96xl384 vCPU · 1536 GiB
m8i.48xlarge

The m8i.48xlarge is a general-purpose AWS EC2 instance: 192 vCPU and 768 GiB of memory, 4.00 GiB per vCPU. In the name, "m" is the general-purpose line, "8" is the generation, "i" marks Intel processors and "48xlarge" is the size within the m8i family. It runs on Intel Xeon Scalable (Granite Rapids) at 3.9 GHz, and AWS introduced it in August 2025. AWS has since shipped m9g; m9g.48xlarge is the direct replacement at this size, scoring 6,999,210 CoreMark/s against this instance's 4,350,042 — roughly 61% more throughput for the same vCPU count. No single Spot node covers 192 vCPU and 768 GiB, so the equivalent is a fleet: 12 × gp.vs2.2xlarge, 192 vCPU and 768 GiB in total, about 95% below the US East (N. Virginia) on-demand rate. 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

m8i.48xlarge gives you 192 vCPU and 768 GiB in a single machine. The largest comparable Spot node, gp.vs2.2xlarge, is 16 vCPU and 64 GiB, so the equivalent here is 12 nodes rather than one.

Spot runs as managed Kubernetes, so a 12-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 192 cores and 768 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$10.161$2.139$0.492
$9.669 savings
US Central, Chicagono AWS region$0.492
US Central, Dallasno AWS region$0.612
Hong Kong$0.132
Sydney, Australia$12.701$5.091$1.932
$10.769 savings
London, UK$11.748$1.891$2.652
$9.096 savings
US West, San Jose$11.854$1.725$1.812
$10.042 savings
US Central, Dallas 2no AWS region$0.012
US East, N. Virginia 2$10.161$2.139$1.812
$8.349 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 768 GiB of RAM
  • ●Parallel work that can occupy 192 vCPU
  • ●Network-heavy services — AWS rates this size at 75 Gigabit
  • ●Anything that shards cleanly across 12 nodes, which is how it maps onto Rackspace Spot
Avoid if
  • ●The working set needs more than 768 GiB of RAM
  • ●Local NVMe or instance-store disk is a hard requirement
  • ●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 192 vCPU would sit idle.
m8i.48xlarge runs $7,417/mo on AWS on-demand. The 12-node equivalent on Rackspace Spot: $359/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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