Instances›AWS EC2›c8gd›c8gd.4xlarge
Compute
vCPUs16
Memory32 GiB
Mem / vCPU2.00 GiB
ProcessorGraviton4 Processor
Clock speed2.7 GHz
Architecturearm64
Storage
Type1 × 950 GB NVMe SSD
Bandwidth10,000 Mbps
Throughput1250 MB/s
IOPS40,000
Networking
PerformanceUp to 15 Gigabit
Max ENIs8
IPv6Yes
GPUNone
Family sizes
c8gd.medium1 vCPU · 2 GiB
c8gd.large2 vCPU · 4 GiB
c8gd.xlarge4 vCPU · 8 GiB
c8gd.2xlarge8 vCPU · 16 GiB
c8gd.4xlarge16 vCPU · 32 GiB
c8gd.8xlarge32 vCPU · 64 GiB
c8gd.12xlarge48 vCPU · 96 GiB
c8gd.16xlarge64 vCPU · 128 GiB
c8gd.24xlarge96 vCPU · 192 GiB
c8gd.metal-24xl96 vCPU · 192 GiB
c8gd.48xlarge192 vCPU · 384 GiB
c8gd.metal-48xl192 vCPU · 384 GiB
c8gd.4xlarge

The c8gd.4xlarge is a compute-optimized AWS EC2 instance: 16 vCPU and 32 GiB of memory, 2.00 GiB per vCPU. In the name, "c" stands for compute, "8" is the generation, "gd" marks AWS Graviton (ARM) processors and local NVMe storage and "4xlarge" is the size within the c8gd family. It runs on AWS Graviton4 Processor at 2.7 GHz, and AWS introduced it in April 2025. AWS has since shipped c9gd; c9gd.4xlarge is the direct replacement at this size. Rackspace Spot's ch.vs1.2xlarge is a like-for-like substitute at 16 vCPU and 32 GiB, about 95% below the US East (N. Virginia) on-demand rate.

Match qualityx86 substitution

c8gd.4xlarge is Graviton (arm64). Rackspace Spot does not have arm64 servers, so ch.vs1.2xlarge is an x86_64 substitute with similar specs.

You will need x86 builds of your container images. Most software rebuilds without changes, but anything with compiled native code needs a real rebuild rather than a retag. Speed per core also differs between the two chips, so it is worth testing before deciding how many nodes to run.

No local diskc8gd.4xlarge comes with 1 × 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$0.784$0.219$0.041
$0.743 savings
US Central, Chicagono AWS region$0.011
US Central, Dallasno AWS region$0.111
Hong Kong$0.041
Sydney, Australia$1.029$0.313$0.041
$0.988 savings
London, UK$0.939$0.292$0.131
$0.808 savings
US West, San Jose$0.002
US Central, Dallas 2no AWS region$0.122
US East, N. Virginia 2$0.784$0.219$0.162
$0.622 savings
When to use it
Good for
  • ●High-traffic web and API serving
  • ●Scientific modelling and simulation
  • ●Ad serving and real-time bidding
  • ●Workloads that fit inside 32 GiB of RAM
  • ●Jobs that want 1 × 950 GB of local NVMe scratch space
  • ●Network-heavy services — AWS rates this size at Up to 15 Gigabit
Avoid if
  • ●The working set needs more than 32 GiB of RAM
  • ●You cannot rebuild x86-only binaries or vendor images for aarch64
  • ●More than 2.00 GiB of RAM per vCPU is needed — that ratio is fixed for the whole family
  • ●The work is single-threaded. Most of these 16 vCPU would sit idle.
  • ●GPU or FPGA acceleration is needed
  • ●Memory-hungry applications. A memory-optimized family gives more RAM per dollar.
Stop overpaying AWS. This compute costs $572/mo on AWS vs $30/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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