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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 • 384.0 GiB RAM • EBS only • Up to 22500 Megabit Network
Price (Linux)
$3.1673/ hr
~$2,312.11/mo
Compute
48vCPUs
24 cores • x86_64
Memory
384.0GiB
8.0 GiB / vCPU
Value
$0.0660/ vCPU-hr
$0.0082/GiB-hr
Network
22.5Gbps
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 GiB-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 22500 Megabit
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
Region NameRegion CodeOn-Demand Price
Africa (Cape Town)
af-south-1$4.2230
Asia Pacific (Hyderabad)
ap-south-2$3.2678
Asia Pacific (Malaysia)
ap-southeast-5$3.2477
Asia Pacific (Mumbai)
ap-south-1$3.2678
Asia Pacific (New Zealand)
ap-southeast-6$3.9854
Asia Pacific (Seoul)
ap-northeast-2$3.8208
Asia Pacific (Singapore)
ap-southeast-1$3.8208
Asia Pacific (Sydney)
ap-southeast-2$3.7958
Asia Pacific (Tokyo)
ap-northeast-1$3.8208
AWS GovCloud (US-East)
us-gov-east-1$3.7958
AWS GovCloud (US-West)
us-gov-west-1$3.7958
Canada (Central)
ca-central-1$3.4690
Canada West (Calgary)
ca-west-1$3.4690
EU (Frankfurt)
eu-central-1$3.8208
EU (Ireland)
eu-west-1$3.5443
EU (London)
eu-west-2$3.7202
EU (Milan)
eu-south-1$3.7202
EU (Paris)
eu-west-3$3.7202
EU (Stockholm)
eu-north-1$3.3684
Europe (Spain)
eu-south-2$3.5443
Europe (Zurich)
eu-central-2$4.2029
Middle East (UAE)
me-central-1$3.8988
South America (Sao Paulo)Highest
sa-east-1$5.0525
US East (N. Virginia)Lowest
us-east-1$3.1673
US East (Ohio)Lowest
us-east-2$3.1673
US West (N. California)
us-west-1$3.5191
US West (Oregon)Lowest
us-west-2$3.1673