Instances›AWS EC2›c7a›c7a.xlarge
Compute
vCPUs4
Memory8 GiB
Mem / vCPU2.00 GiB
ProcessorEPYC 9R14 Processor
Clock speedUp to 3.7 GHz
Architecturex86_64
Storage
TypeEBS only
Bandwidth10,000 Mbps
Throughput1250 MB/s
IOPS40,000
Networking
PerformanceUp to 12.5 Gigabit
Max ENIs4
IPv6Yes
GPUNone
Family sizes
c7a.medium1 vCPU · 2 GiB
c7a.large2 vCPU · 4 GiB
c7a.xlarge4 vCPU · 8 GiB
c7a.2xlarge8 vCPU · 16 GiB
c7a.4xlarge16 vCPU · 32 GiB
c7a.8xlarge32 vCPU · 64 GiB
c7a.12xlarge48 vCPU · 96 GiB
c7a.16xlarge64 vCPU · 128 GiB
c7a.24xlarge96 vCPU · 192 GiB
c7a.32xlarge128 vCPU · 256 GiB
c7a.48xlarge192 vCPU · 384 GiB
c7a.metal-48xl192 vCPU · 384 GiB
c7a.xlarge

The c7a.xlarge is a compute-optimized AWS EC2 instance: 4 vCPU and 8 GiB of memory, 2.00 GiB per vCPU. In the name, "c" stands for compute, "7" is the generation, "a" marks AMD processors and "xlarge" is the size within the c7a family. It runs on AMD EPYC 9R14 Processor at Up to 3.7 GHz, and AWS introduced it in October 2023. AWS has since shipped c8a and c9g; c8a.xlarge is the direct replacement at this size, scoring 188,147 CoreMark/s against this instance's 133,082 — roughly 41% more throughput for the same vCPU count. Rackspace Spot's ch.vs2.large is a like-for-like substitute at 4 vCPU and 8 GiB, about 90% below the US East (N. Virginia) on-demand rate.

Pricing by region
1 hr
RegionAWS on-demandAWS Spot1-yr Reserved3-yr ReservedRackspace SpotYou save
US East, N. Virginia$0.205$0.080$0.136$0.090$0.021
$0.184 savings
US Central, Chicagono AWS region$0.011
US Central, Dallasno AWS region$0.021
Hong Kong$0.036
Sydney, Australia$0.011
London, UK$0.244$0.092$0.161$0.111$0.026
$0.218 savings
US West, San Jose$0.256$0.100$0.169$0.116$0.031
$0.225 savings
US Central, Dallas 2no AWS region$0.041
US East, N. Virginia 2$0.205$0.080$0.136$0.090$0.031
$0.174 savings
When to use it
Good for
  • ●Scientific modelling and simulation
  • ●Ad serving and real-time bidding
  • ●Game servers and matchmaking
  • ●Workloads that fit inside 8 GiB of RAM
  • ●Small, steady services that do not need more than 4 vCPU
  • ●Network-heavy services — AWS rates this size at Up to 12.5 Gigabit
Avoid if
  • ●Starting a new deployment. c8a.xlarge is the newer generation at this size.
  • ●The working set needs more than 8 GiB of RAM
  • ●Memory-hungry applications. A memory-optimized family gives more RAM per dollar.
  • ●More than 2.00 GiB of RAM per vCPU is needed — that ratio is fixed for the whole family
  • ●Local NVMe or instance-store disk is a hard requirement
  • ●GPU or FPGA acceleration is needed
c7a.xlarge runs $150/mo on AWS on-demand. The equivalent on Rackspace Spot: $15/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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