Instances›AWS EC2›c4›c4.4xlarge
Compute
vCPUs16
Memory30 GiB
Mem / vCPU1.88 GiB
ProcessorXeon E5-2666 v3
Clock speed2.9 GHz
Architecturex86_64
Storage
TypeEBS only
Bandwidth2,000 Mbps
Throughput250 MB/s
IOPS16,000
Networking
PerformanceHigh
Max ENIs8
IPv6Yes
GPUNone
Family sizes
c4.large2 vCPU · 3.75 GiB
c4.xlarge4 vCPU · 7.5 GiB
c4.2xlarge8 vCPU · 15 GiB
c4.4xlarge16 vCPU · 30 GiB
c4.8xlarge36 vCPU · 60 GiB
c4.4xlarge

The c4.4xlarge pairs 16 vCPU with 30 GiB of RAM, the 1.88 GiB-per-vCPU ratio that marks a compute-optimized instance. In the name, "c" stands for compute, "4" is the generation and "4xlarge" is the size within the c4 family. It runs on Intel Xeon E5-2666 v3 (Haswell) at 2.9 GHz, and AWS introduced it in January 2015. AWS has since shipped c5, c6i, c7i and c8i; c5.4xlarge is the direct replacement at this size. ch.vs1.2xlarge on Rackspace Spot lines up one-for-one: 16 vCPU and 32 GiB, about 95% 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$0.796$0.304$0.504$0.354$0.041
$0.755 savings
US Central, Chicagono AWS region$0.011
US Central, Dallasno AWS region$0.111
Hong Kong$0.041
Sydney, Australia$1.042$0.325$0.672$0.501$0.041
$1.001 savings
London, UK$0.950$0.281$0.655$0.501$0.131
$0.819 savings
US West, San Jose$0.997$0.149$0.680$0.492$0.002
$0.995 savings
US Central, Dallas 2no AWS region$0.122
US East, N. Virginia 2$0.796$0.304$0.504$0.354$0.162
$0.634 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 30 GiB of RAM
  • ●Parallel work that can occupy 16 vCPU
Avoid if
  • ●Starting a new deployment. c5.4xlarge is the newer generation at this size.
  • ●The working set needs more than 30 GiB of RAM
  • ●Local NVMe or instance-store disk is a hard requirement
  • ●GPU or FPGA acceleration is needed
  • ●Memory-hungry applications. A memory-optimized family gives more RAM per dollar.
  • ●More than 1.88 GiB of RAM per vCPU is needed — that ratio is fixed for the whole family
c4.4xlarge runs $581/mo on AWS on-demand. The equivalent on Rackspace Spot: $30/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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