Instances›AWS EC2›c7i-flex›c7i-flex.xlarge
Compute
vCPUs4
Memory8 GiB
Mem / vCPU2.00 GiB
ProcessorXeon Scalable
Clock speed3.2 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
c7i-flex.large2 vCPU · 4 GiB
c7i-flex.xlarge4 vCPU · 8 GiB
c7i-flex.2xlarge8 vCPU · 16 GiB
c7i-flex.4xlarge16 vCPU · 32 GiB
c7i-flex.8xlarge32 vCPU · 64 GiB
c7i-flex.12xlarge48 vCPU · 96 GiB
c7i-flex.16xlarge64 vCPU · 128 GiB
c7i-flex.xlarge

The c7i-flex.xlarge is a compute-optimized AWS EC2 instance: 4 vCPU and 8 GiB of memory, 2.00 GiB per vCPU. It runs on Intel Xeon Scalable (Sapphire Rapids) at 3.2 GHz, and AWS introduced it in May 2024. Rackspace Spot's ch.vs2.large is a like-for-like substitute at 4 vCPU and 8 GiB, about 88% 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$0.170$0.064$0.112$0.075$0.021
$0.149 savings
US Central, Chicagono AWS region$0.011
US Central, Dallasno AWS region$0.021
Hong Kong$0.215$0.142$0.098$0.036
$0.179 savings
Sydney, Australia$0.222$0.094$0.146$0.101$0.011
$0.210 savings
London, UK$0.202$0.028$0.133$0.092$0.026
$0.176 savings
US West, San Jose$0.211$0.075$0.140$0.096$0.031
$0.180 savings
US Central, Dallas 2no AWS region$0.041
US East, N. Virginia 2$0.170$0.064$0.112$0.075$0.031
$0.139 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 8 GiB of RAM
  • ●Small, steady services that do not need more than 4 vCPU
  • ●Network-heavy services — AWS rates this size at Up to 12.5 Gigabit
Avoid if
  • ●The working set needs more than 8 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
c7i-flex.xlarge runs $124/mo on AWS on-demand. The equivalent on Rackspace Spot: $15/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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