Instances›AWS EC2›c6in›c6in.4xlarge
Compute
vCPUs16
Memory32 GiB
Mem / vCPU2.00 GiB
ProcessorXeon 8375C
Clock speed3.5 GHz
Architecturex86_64
Storage
TypeEBS only
Bandwidth25,000 Mbps
Throughput3125 MB/s
IOPS100,000
Networking
PerformanceUp to 50 Gigabit
Max ENIs8
IPv6Yes
GPUNone
Family sizes
c6in.large2 vCPU · 4 GiB
c6in.xlarge4 vCPU · 8 GiB
c6in.2xlarge8 vCPU · 16 GiB
c6in.4xlarge16 vCPU · 32 GiB
c6in.8xlarge32 vCPU · 64 GiB
c6in.12xlarge48 vCPU · 96 GiB
c6in.16xlarge64 vCPU · 128 GiB
c6in.24xlarge96 vCPU · 192 GiB
c6in.32xlarge128 vCPU · 256 GiB
c6in.metal128 vCPU · 256 GiB
c6in.4xlarge

The c6in.4xlarge pairs 16 vCPU with 32 GiB of RAM, the 2.00 GiB-per-vCPU ratio that marks a compute-optimized instance. In the name, "c" stands for compute, "6" is the generation, "in" marks Intel processors and enhanced networking and "4xlarge" is the size within the c6in family. It runs on Intel Xeon 8375C (Ice Lake) at 3.5 GHz, and AWS introduced it in November 2022. AWS has since shipped c7i, c8in and c9g; c7i.4xlarge is the direct replacement at this size, scoring 382,775 CoreMark/s against this instance's 269,837 — roughly 42% more throughput for the same vCPU count. 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$0.907$0.253$0.572$0.329$0.041
$0.866 savings
US Central, Chicagono AWS region$0.011
US Central, Dallasno AWS region$0.111
Hong Kong$1.201$0.757$0.468$0.041
$1.160 savings
Sydney, Australia$1.184$0.261$0.746$0.459$0.041
$1.143 savings
London, UK$1.075$0.210$0.677$0.450$0.131
$0.944 savings
US West, San Jose$1.134$0.360$0.714$0.455$0.002
$1.132 savings
US Central, Dallas 2no AWS region$0.122
US East, N. Virginia 2$0.907$0.253$0.572$0.329$0.162
$0.745 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 32 GiB of RAM
  • ●Parallel work that can occupy 16 vCPU
  • ●Network-heavy services — AWS rates this size at Up to 50 Gigabit
Avoid if
  • ●Starting a new deployment. c7i.4xlarge is the newer generation at this size.
  • ●The working set needs more than 32 GiB of RAM
  • ●The work is single-threaded. Most of these 16 vCPU would sit idle.
  • ●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.
Stop overpaying AWS. This compute costs $662/mo on AWS vs $30/mo on Rackspace Spot.
  • 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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