Instances›AWS EC2›c5n›c5n.large
Compute
vCPUs2
Memory5.25 GiB
Mem / vCPU2.63 GiB
ProcessorXeon Platinum 8124M
Clock speed3 GHz
Architecturex86_64
Storage
TypeEBS only
Bandwidth4,750 Mbps
Throughput593.75 MB/s
IOPS20,000
Networking
PerformanceUp to 25 Gigabit
Max ENIs3
IPv6Yes
GPUNone
Family sizes
c5n.large2 vCPU · 5.25 GiB
c5n.xlarge4 vCPU · 10.5 GiB
c5n.2xlarge8 vCPU · 21 GiB
c5n.4xlarge16 vCPU · 42 GiB
c5n.9xlarge36 vCPU · 96 GiB
c5n.18xlarge72 vCPU · 192 GiB
c5n.metal72 vCPU · 192 GiB
c5n.large

The c5n.large pairs 2 vCPU with 5.25 GiB of RAM, the 2.63 GiB-per-vCPU ratio that marks a compute-optimized instance. In the name, "c" stands for compute, "5" is the generation, "n" marks enhanced networking and "large" is the size within the c5n family. It runs on Intel Xeon Platinum 8124M at 3 GHz, and AWS introduced it in November 2018. AWS has since shipped c6i, c7i, c8i and c9g; c6i.large is the direct replacement at this size, scoring 35,321 CoreMark/s against this instance's 31,366 — roughly 13% more throughput for the same vCPU count. ch.vs1.large is the closest Spot shape: 4 vCPU and 8 GiB, so 2 more vCPU and 2.75 GiB more memory, about 81% 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$0.108$0.040$0.068$0.039$0.021
$0.087 savings
US Central, Chicagono AWS region$0.011
US Central, Dallasno AWS region$0.021
Hong Kong$0.143$0.090$0.056$0.036
$0.107 savings
Sydney, Australia$0.141$0.049$0.089$0.055$0.011
$0.130 savings
London, UK$0.128$0.045$0.081$0.054$0.026
$0.102 savings
US West, San Jose$0.135$0.032$0.085$0.054$0.031
$0.104 savings
US Central, Dallas 2no AWS region$0.041
US East, N. Virginia 2$0.108$0.040$0.068$0.039$0.031
$0.077 savings
When to use it
Good for
  • ●Video encoding and transcoding
  • ●High-traffic web and API serving
  • ●Scientific modelling and simulation
  • ●Workloads that fit inside 5.25 GiB of RAM
  • ●Small, steady services that do not need more than 2 vCPU
  • ●Network-heavy services — AWS rates this size at Up to 25 Gigabit
Avoid if
  • ●Starting a new deployment. c6i.large is the newer generation at this size.
  • ●The working set needs more than 5.25 GiB of RAM
  • ●GPU or FPGA acceleration is needed
  • ●Memory-hungry applications. A memory-optimized family gives more RAM per dollar.
  • ●More than 2.63 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
$79/mo on AWS on-demand against $15/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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