AWS Amazon EC2

r8i-flex.12xlarge

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

Name:rMemory Optimized88th GenerationiIntel Xeon ScalableflexFlex Instance12xlarge12 Extra Large

On-demand, Linux

$3.1673/ hr

~$2,312.11/mo · lowest in US East (N. Virginia), us-east-1

Savings Plan, Linux

$1.65218/ hr

From, with a 3-year Compute Savings Plan, No Upfront: −48% vs on-demand rate (us-east-1)

Per unit

$0.0660/ vCPU-hr

$0.0082/GB-hr

Compute

48vCPUs

24 cores • x86_64

Memory

384GB

8.0 GB / vCPU

Network

Up to 22.5 Gbps

Baseline: 11.25 Gbps

Storage & EBS

1,875MB/s

Max: 60,000 IOPS

On Google Cloud

The nearest Google Cloud machines to r8i-flex.12xlarge by vCPU and memory, at On-demand Linux rates in Northern Virginia (us-east-1 ↔ us-east4).

Machine	Size	On-demand Linux	vs r8i-flex.12xlarge
r8i-flex.12xlargeThis page · AWS, us-east-1	48 vCPU · 384 GiB	$3.16728/hr	—
n4-highmem-48same 48 vCPU and 384 GiB; Intel on both; r8i-flex.12xlarge is CPU-capped (flex)	48 vCPU · 384 GiB	$2.85648/hr	9.8% less
n2-highmem-48same 48 vCPU and 384 GiB; Intel on both; r8i-flex.12xlarge is CPU-capped (flex)	48 vCPU · 384 GiB	$3.541104/hr	12% more
n4d-highmem-48same 48 vCPU and 384 GiB; Intel vs AMD; r8i-flex.12xlarge is CPU-capped (flex)	48 vCPU · 384 GiB	$2.66832/hr	16% less

Matched on vCPU and memory, then CPU vendor, then rate; a larger size is offered only when nothing is the same size. On-demand Linux only: Spot and commitments work differently on the two clouds, so they aren't compared here.

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 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)

Rates by region

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	On-Demand Price	% vs On-Demand Rate
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

Windows — Available in all 27 regions
Region	On-Demand Price	% vs On-Demand Rate
af-south-1 Africa (Cape Town)	$6.3206
ap-south-2 Asia Pacific (Hyderabad)	$5.3654
ap-southeast-5 Asia Pacific (Malaysia)	$5.3453
ap-south-1 Asia Pacific (Mumbai)	$5.3654
ap-southeast-6 Asia Pacific (New Zealand)	$6.0830
ap-northeast-2 Asia Pacific (Seoul)	$5.9184
ap-southeast-1 Asia Pacific (Singapore)	$5.9184
ap-southeast-2 Asia Pacific (Sydney)	$5.8934
ap-northeast-1 Asia Pacific (Tokyo)	$5.9184
us-gov-east-1 AWS GovCloud (US-East)	$5.8934
us-gov-west-1 AWS GovCloud (US-West)	$5.8934
ca-central-1 Canada (Central)	$5.5666
ca-west-1 Canada West (Calgary)	$5.5666
eu-central-1 EU (Frankfurt)	$5.9184
eu-west-1 EU (Ireland)	$5.6419
eu-west-2 EU (London)	$5.8178
eu-south-1 EU (Milan)	$5.8178
eu-west-3 EU (Paris)	$5.8178
eu-north-1 EU (Stockholm)	$5.4660
eu-south-2 Europe (Spain)	$5.6419
eu-central-2 Europe (Zurich)	$6.3005
me-central-1 Middle East (UAE)	$5.9964
sa-east-1 South America (Sao Paulo) Highest	$7.1501
us-east-1 US East (N. Virginia) Lowest	$5.2649
us-east-2 US East (Ohio) Lowest	$5.2649
us-west-1 US West (N. California)	$5.6167
us-west-2 US West (Oregon) Lowest	$5.2649

Savings Plans: what to know

A Savings Plan commits you to a dollar amount per hour of spend for one or three years, not to an instance: usage up to that amount is billed at the plan's rates and the rest at on-demand, and unused commitment is still billed.
A Compute Savings Plan follows your usage across instance families, sizes, regions and operating systems; an EC2 Instance Savings Plan is locked to one family in one region in exchange for a lower rate (what that flexibility costs).
In US East (N. Virginia) (us-east-1), the 3-year Compute Savings Plan rate (No Upfront) for r8i-flex.12xlarge on Linux is 52% of the on-demand rate, so the instance has to run at least 52% of the hours for the commitment to cost less than on-demand.
On Windows a plan discounts only the compute part of the rate: the Windows license part costs the same as on demand, so the percentage off is smaller than on Linux.
Rates are AWS's effective hourly rate for each payment option; All Upfront pays the whole term's commitment at purchase, which is why its hourly rate is lower; Partial Upfront (at least half up front) isn't shown on this page. The Savings Plans calculator has all three and sizes a commitment for this instance or a mix of them. How AWS applies a plan each hour: how Compute Savings Plans decide what they cover. Sizing one for elastic workloads: managing Compute Savings Plans.