Instances›AWS EC2›c6a›c6a.2xlarge
Compute
vCPUs8
Memory16 GiB
Mem / vCPU2.00 GiB
ProcessorEPYC 7R13 Processor
Clock speed3.6 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
c6a.large2 vCPU · 4 GiB
c6a.xlarge4 vCPU · 8 GiB
c6a.2xlarge8 vCPU · 16 GiB
c6a.4xlarge16 vCPU · 32 GiB
c6a.8xlarge32 vCPU · 64 GiB
c6a.12xlarge48 vCPU · 96 GiB
c6a.16xlarge64 vCPU · 128 GiB
c6a.24xlarge96 vCPU · 192 GiB
c6a.32xlarge128 vCPU · 256 GiB
c6a.48xlarge192 vCPU · 384 GiB
c6a.metal192 vCPU · 384 GiB
c6a.2xlarge

c6a.2xlarge is AWS's compute-optimized EC2 size at 8 vCPU and 16 GiB. In the name, "c" stands for compute, "6" is the generation, "a" marks AMD processors and "2xlarge" is the size within the c6a family. It runs on AMD EPYC 7R13 Processor at 3.6 GHz, and AWS introduced it in February 2022. AWS has since shipped c7a, c8a and c9g; c7a.2xlarge is the direct replacement at this size, scoring 257,511 CoreMark/s against this instance's 181,777 — roughly 42% more throughput for the same vCPU count. On Rackspace Spot the same shape is ch.vs2.xlarge — 8 vCPU, 16 GiB, matched on both dimensions, $0.306/hr on AWS in US East (N. Virginia), from $0.006/hr on Rackspace Spot.

Pricing by region
1 hr
RegionAWS on-demandAWS Spot1-yr Reserved3-yr ReservedRackspace SpotYou save
US East, N. Virginia$0.306$0.134$0.202$0.135$0.006
$0.300 savings
US Central, Chicagono AWS region$0.061
US Central, Dallasno AWS region$0.041
Hong Kong$0.389$0.257$0.176$0.061
$0.328 savings
Sydney, Australia$0.400$0.198$0.264$0.182$0.016
$0.384 savings
London, UK$0.364$0.147$0.240$0.165$0.021
$0.343 savings
US West, San Jose$0.382$0.173$0.252$0.173$0.001
$0.381 savings
US Central, Dallas 2no AWS region$0.061
US East, N. Virginia 2$0.306$0.134$0.202$0.135$0.081
$0.225 savings
When to use it
Good for
  • ●Game servers and matchmaking
  • ●Batch processing and CI/CD runners
  • ●Video encoding and transcoding
  • ●Workloads that fit inside 16 GiB of RAM
  • ●Parallel work that can occupy 8 vCPU
  • ●Network-heavy services — AWS rates this size at Up to 12.5 Gigabit
Avoid if
  • ●Starting a new deployment. c7a.2xlarge is the newer generation at this size.
  • ●The working set needs more than 16 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
$223/mo on AWS on-demand against $4/mo on Rackspace Spot for the 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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