Instances›AWS EC2›m7i-flex›m7i-flex.8xlarge
Compute
vCPUs32
Memory128 GiB
Mem / vCPU4.00 GiB
ProcessorXeon Scalable
Clock speed3.5 GHz
Architecturex86_64
Storage
TypeEBS only
Bandwidth10,000 Mbps
Throughput1250 MB/s
IOPS40,000
Networking
PerformanceUp to 12.5 Gigabit
Max ENIs8
IPv6Yes
GPUNone
Family sizes
m7i-flex.large2 vCPU · 8 GiB
m7i-flex.xlarge4 vCPU · 16 GiB
m7i-flex.2xlarge8 vCPU · 32 GiB
m7i-flex.4xlarge16 vCPU · 64 GiB
m7i-flex.8xlarge32 vCPU · 128 GiB
m7i-flex.12xlarge48 vCPU · 192 GiB
m7i-flex.16xlarge64 vCPU · 256 GiB
m7i-flex.8xlarge

The m7i-flex.8xlarge pairs 32 vCPU with 128 GiB of RAM, the 4.00 GiB-per-vCPU ratio that marks a general-purpose instance. It runs on Intel Xeon Scalable (Sapphire Rapids) at 3.5 GHz, and AWS introduced it in August 2023. Spot's node ladder tops out below this size, so m7i-flex.8xlarge becomes 2 × gp.vs2.2xlarge (32 vCPU, 128 GiB combined), 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

m7i-flex.8xlarge gives you 32 vCPU and 128 GiB in a single machine. The largest comparable Spot node, gp.vs2.2xlarge, is 16 vCPU and 64 GiB, so the equivalent here is 2 nodes rather than one.

Spot runs as managed Kubernetes, so a 2-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 32 cores and 128 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$1.532$0.412$1.014$0.695$0.082
$1.450 savings
US Central, Chicagono AWS region$0.082
US Central, Dallasno AWS region$0.102
Hong Kong$2.107$1.394$0.956$0.022
$2.085 savings
Sydney, Australia$1.915$0.770$1.267$0.869$0.322
$1.593 savings
London, UK$1.772$0.234$1.170$0.805$0.442
$1.330 savings
US West, San Jose$1.788$0.584$1.179$0.814$0.302
$1.486 savings
US Central, Dallas 2no AWS region$0.002
US East, N. Virginia 2$1.532$0.412$1.014$0.695$0.302
$1.230 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 128 GiB of RAM
  • ●Parallel work that can occupy 32 vCPU
  • ●Network-heavy services — AWS rates this size at Up to 12.5 Gigabit
  • ●Anything that shards cleanly across 2 nodes, which is how it maps onto Rackspace Spot
Avoid if
  • ●The working set needs more than 128 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 32 vCPU would sit idle.
m7i-flex.8xlarge runs $1,119/mo on AWS on-demand. The 2-node equivalent on Rackspace Spot: $60/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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