Instances›AWS EC2›c6i›c6i.2xlarge
Compute
vCPUs8
Memory16 GiB
Mem / vCPU2.00 GiB
ProcessorXeon 8375C
Clock speed3.5 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
c6i.large2 vCPU · 4 GiB
c6i.xlarge4 vCPU · 8 GiB
c6i.2xlarge8 vCPU · 16 GiB
c6i.4xlarge16 vCPU · 32 GiB
c6i.8xlarge32 vCPU · 64 GiB
c6i.12xlarge48 vCPU · 96 GiB
c6i.16xlarge64 vCPU · 128 GiB
c6i.24xlarge96 vCPU · 192 GiB
c6i.32xlarge128 vCPU · 256 GiB
c6i.metal128 vCPU · 256 GiB
c6i.2xlarge

The c6i.2xlarge is a compute-optimized AWS EC2 instance: 8 vCPU and 16 GiB of memory, 2.00 GiB per vCPU. In the name, "c" stands for compute, "6" is the generation, "i" marks Intel processors and "2xlarge" is the size within the c6i family. It runs on Intel Xeon 8375C (Ice Lake) at 3.5 GHz, and AWS introduced it in October 2021. AWS has since shipped c7i, c8i and c9g; c7i.2xlarge is the direct replacement at this size, scoring 159,212 CoreMark/s against this instance's 136,840 — roughly 16% more throughput for the same vCPU count. Rackspace Spot's ch.vs2.xlarge is a like-for-like substitute at 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$0.146$0.225$0.150$0.006
$0.334 savings
US Central, Chicagono AWS region$0.061
US Central, Dallasno AWS region$0.041
Hong Kong$0.432$0.286$0.196$0.061
$0.371 savings
Sydney, Australia$0.444$0.222$0.293$0.202$0.016
$0.428 savings
London, UK$0.404$0.155$0.267$0.184$0.021
$0.383 savings
US West, San Jose$0.424$0.177$0.280$0.193$0.001
$0.423 savings
US Central, Dallas 2no AWS region$0.061
US East, N. Virginia 2$0.340$0.146$0.225$0.150$0.081
$0.259 savings
When to use it
Good for
  • ●Batch processing and CI/CD runners
  • ●Video encoding and transcoding
  • ●High-traffic web and API serving
  • ●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. c7i.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
c6i.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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