Instances›AWS EC2›c5›c5.2xlarge
Compute
vCPUs8
Memory16 GiB
Mem / vCPU2.00 GiB
ProcessorXeon Platinum 8124M
Clock speed3.4 GHz
Architecturex86_64
Storage
TypeEBS only
Bandwidth4,750 Mbps
Throughput593.75 MB/s
IOPS20,000
Networking
PerformanceUp to 10 Gigabit
Max ENIs4
IPv6Yes
GPUNone
Family sizes
c5.large2 vCPU · 4 GiB
c5.xlarge4 vCPU · 8 GiB
c5.2xlarge8 vCPU · 16 GiB
c5.4xlarge16 vCPU · 32 GiB
c5.9xlarge36 vCPU · 72 GiB
c5.12xlarge48 vCPU · 96 GiB
c5.18xlarge72 vCPU · 144 GiB
c5.24xlarge96 vCPU · 192 GiB
c5.metal96 vCPU · 192 GiB
c5.2xlarge

The c5.2xlarge pairs 8 vCPU with 16 GiB of RAM, the 2.00 GiB-per-vCPU ratio that marks a compute-optimized instance. In the name, "c" stands for compute, "5" is the generation and "2xlarge" is the size within the c5 family. It runs on Intel Xeon Platinum 8124M at 3.4 GHz, and AWS introduced it in November 2017. AWS has since shipped c6i, c7i, c8i and c9g; c6i.2xlarge is the direct replacement at this size. ch.vs1.xlarge on Rackspace Spot lines up one-for-one: 8 vCPU and 16 GiB, $0.340/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$0.340$0.130$0.214$0.142$0.006
$0.334 savings
US Central, Chicagono AWS region$0.061
US Central, Dallasno AWS region$0.041
Hong Kong$0.432$0.272$0.187$0.061
$0.371 savings
Sydney, Australia$0.444$0.183$0.280$0.192$0.016
$0.428 savings
London, UK$0.404$0.113$0.255$0.175$0.021
$0.383 savings
US West, San Jose$0.424$0.128$0.267$0.183$0.001
$0.423 savings
US Central, Dallas 2no AWS region$0.061
US East, N. Virginia 2$0.340$0.130$0.214$0.142$0.081
$0.259 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 16 GiB of RAM
  • ●Parallel work that can occupy 8 vCPU
  • ●Network-heavy services — AWS rates this size at Up to 10 Gigabit
Avoid if
  • ●Starting a new deployment. c6i.2xlarge is the newer generation at this size.
  • ●The working set needs more than 16 GiB of RAM
  • ●GPU or FPGA acceleration is needed
  • ●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
c5.2xlarge runs $248/mo on AWS on-demand. The equivalent on Rackspace Spot: $4/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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