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r8i-flex.12xlarge

Part of the R8I-FLEX Memory Optimized family — High memory-to-vCPU ratio for memory-intensive applications.

Name:rMemory Optimizedr = Memory OptimizedHigh memory-to-vCPU ratio designed for memory-intensive applications such as databases, distributed caches, and in-memory analytics.88th Generation8 = 8th GenerationAWS 8th generation hardware platform with updated CPU/system architecture.iIntel Xeon Scalablei = Intel Xeon ScalableIntel Xeon Scalable (Granite Rapids) (x86_64). Powered by Intel Xeon Scalable x86_64 processors with Intel Advanced Vector Extensions (AVX-512 / AMX) acceleration.flexFlex Instanceflex = Flex InstanceFlex instances offer up to 19% better price-to-performance for workloads that do not continuously utilize full compute capacity.12xlarge12 Extra Large12xlarge = 12 Extra Large48 vCPUs • 384 GB RAM • EBS only • Up to 22.5 Gbps Network
Price (Linux)
$3.1673/ hr
~$2,312.11/mo
Compute
48vCPUs
24 cores • x86_64
Memory
384GB
8.0 GB / vCPU
Value
$0.0660/ vCPU-hr
$0.0082/GB-hr
Network
Up to 22.5 Gbps
Baseline: 11.25 Gbps
Storage & EBS
1,875MB/s
Max: 60,000 IOPS

Technical Specifications & Limits

Hardware specs, container thresholds, and system limits

Compute & Processor

ProcessorIntel Xeon Scalable (Granite Rapids)
Architecturex86_64 (x86_64)
vCPUs / Threads48 vCPUs
Physical Cores24
Clock Speed3.9 GHz
Intel AVX / AVX2AVX & AVX2 Supported
Intel Turbo BoostYes
Bare MetalNo (Virtualized)

Performance & Benchmarks

CoreMark Score1,195,170
CoreMark / vCPU24,899.4 / core
FFmpeg Transcoding266 FPS
CoreMark per Dollar377,349 score / $
Cost per vCPU-hr$0.0660
Cost per GB-hr$0.0082

Containers & Kubernetes

EKS Max Pods590 pods
Max ECS Tasks120 tasks
Max ENIs12
IPv4/v6 per ENI50
Total Addressable IPs600 total IPs
CNI Prefix DelegationSupported (High Density)

Networking & Bandwidth

Network PerformanceUp to 22.5 Gbps
Baseline Bandwidth11.25 Gbps
Burst / Peak Bandwidth22.5 Gbps
Enhanced NetworkingYes
EFA SupportNo
IPv6 SupportNative Dual-Stack Supported

Storage & EBS Optimization

Storage ConfigurationEBS only
Local NVMe DiskNone (EBS only)
EBS Baseline Throughput937.5 MB/s
EBS Max Throughput1875 MB/s
EBS Baseline IOPS30,000
EBS Max / Burst IOPS60,000
Dedicated EBS ThroughputUp to 15000 Mbps

Platform & Architecture Details

Hypervisor / SystemAWS Nitro System (PCIe Offload)
Nitro EnclavesNot Supported
Normalization Factor96
Generation StatusCurrent Generation (Recommended)
Date Introduced2025-08-19

Regional Pricing Matrix

Live on-demand rates across all global AWS cloud regions
Lowest Price Region
$3.1673/ hr
US East (N. Virginia) (us-east-1)
Highest Price Region
$5.0525/ hr
South America (Sao Paulo) (sa-east-1)
Global Fleet Average
$3.6812/ hr
Across all active regions
Regional Coverage
27regions
Available worldwide
Linux — Available in all 27 regions
RegionOn-Demand Price
af-south-1
Africa (Cape Town)
$4.2230
ap-south-2
Asia Pacific (Hyderabad)
$3.2678
ap-southeast-5
Asia Pacific (Malaysia)
$3.2477
ap-south-1
Asia Pacific (Mumbai)
$3.2678
ap-southeast-6
Asia Pacific (New Zealand)
$3.9854
ap-northeast-2
Asia Pacific (Seoul)
$3.8208
ap-southeast-1
Asia Pacific (Singapore)
$3.8208
ap-southeast-2
Asia Pacific (Sydney)
$3.7958
ap-northeast-1
Asia Pacific (Tokyo)
$3.8208
us-gov-east-1
AWS GovCloud (US-East)
$3.7958
us-gov-west-1
AWS GovCloud (US-West)
$3.7958
ca-central-1
Canada (Central)
$3.4690
ca-west-1
Canada West (Calgary)
$3.4690
eu-central-1
EU (Frankfurt)
$3.8208
eu-west-1
EU (Ireland)
$3.5443
eu-west-2
EU (London)
$3.7202
eu-south-1
EU (Milan)
$3.7202
eu-west-3
EU (Paris)
$3.7202
eu-north-1
EU (Stockholm)
$3.3684
eu-south-2
Europe (Spain)
$3.5443
eu-central-2
Europe (Zurich)
$4.2029
me-central-1
Middle East (UAE)
$3.8988
sa-east-1
South America (Sao Paulo)
Highest
$5.0525
us-east-1
US East (N. Virginia)
Lowest
$3.1673
us-east-2
US East (Ohio)
Lowest
$3.1673
us-west-1
US West (N. California)
$3.5191
us-west-2
US West (Oregon)
Lowest
$3.1673