AWS Amazon EC2

r8i-flex.4xlarge

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

Name:rMemory Optimized88th GenerationiIntel Xeon ScalableflexFlex Instance4xlarge4 Extra Large

On-demand, Linux

$1.0558/ hr

~$770.70/mo · lowest in US East (N. Virginia), us-east-1

Savings Plan, Linux

$0.55073/ 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

16vCPUs

8 cores • x86_64

Memory

128GB

8.0 GB / vCPU

Network

Up to 15 Gbps

Baseline: 3.75 Gbps

Storage & EBS

1,250MB/s

Max: 40,000 IOPS

On Google Cloud

The nearest Google Cloud machines to r8i-flex.4xlarge 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.4xlarge
r8i-flex.4xlargeThis page · AWS, us-east-1	16 vCPU · 128 GiB	$1.05576/hr	—
n4-highmem-16same 16 vCPU and 128 GiB; Intel on both; r8i-flex.4xlarge is CPU-capped (flex)	16 vCPU · 128 GiB	$0.95216/hr	9.8% less
n2-highmem-16same 16 vCPU and 128 GiB; Intel on both; r8i-flex.4xlarge is CPU-capped (flex)	16 vCPU · 128 GiB	$1.180368/hr	12% more
z3-highmem-16-highlssdsame 16 vCPU and 128 GiB; Intel on both; local disk on z3-highmem-16-highlssd only; r8i-flex.4xlarge is CPU-capped (flex)	16 vCPU · 128 GiB	$1.72852/hr	64% more

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 / Threads16 vCPUs

Physical Cores8

Clock Speed3.9 GHz

Intel AVX / AVX2AVX & AVX2 Supported

Intel Turbo BoostYes

Bare MetalNo (Virtualized)

Performance & Benchmarks

CoreMark Score374,036

CoreMark / vCPU23,377.2 / core

FFmpeg Transcoding144 FPS

CoreMark per Dollar354,281 score / $

Cost per vCPU-hr$0.0660

Cost per GB-hr$0.0082

Containers & Kubernetes

EKS Max Pods394 pods

Max ENIs8

IPv4/v6 per ENI50

Total Addressable IPs400 total IPs

CNI Prefix DelegationSupported (High Density)

Networking & Bandwidth

Network PerformanceUp to 15 Gbps

Baseline Bandwidth3.75 Gbps

Burst / Peak Bandwidth15 Gbps

Enhanced NetworkingYes

EFA SupportNo

IPv6 SupportNative Dual-Stack Supported

Storage & EBS Optimization

Storage ConfigurationEBS only

Local NVMe DiskNone (EBS only)

EBS Baseline Throughput312.5 MB/s

EBS Max Throughput1250 MB/s

EBS Baseline IOPS12,000

EBS Max / Burst IOPS40,000

Dedicated EBS ThroughputUp to 10000 Mbps

Platform & Architecture Details

Hypervisor / SystemAWS Nitro System (PCIe Offload)

Nitro EnclavesNot Supported

Normalization Factor32

Generation StatusCurrent Generation (Recommended)

Rates by region

Live on-demand rates across all global AWS cloud regions

Lowest Price Region

$1.0558/ hr

US East (N. Virginia) (us-east-1)

Highest Price Region

$1.6842/ hr

South America (Sao Paulo) (sa-east-1)

Global Fleet Average

$1.2271/ 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)	$1.4077
ap-south-2 Asia Pacific (Hyderabad)	$1.0893
ap-southeast-5 Asia Pacific (Malaysia)	$1.0826
ap-south-1 Asia Pacific (Mumbai)	$1.0893
ap-southeast-6 Asia Pacific (New Zealand)	$1.3285
ap-northeast-2 Asia Pacific (Seoul)	$1.2736
ap-southeast-1 Asia Pacific (Singapore)	$1.2736
ap-southeast-2 Asia Pacific (Sydney)	$1.2653
ap-northeast-1 Asia Pacific (Tokyo)	$1.2736
us-gov-east-1 AWS GovCloud (US-East)	$1.2653
us-gov-west-1 AWS GovCloud (US-West)	$1.2653
ca-central-1 Canada (Central)	$1.1563
ca-west-1 Canada West (Calgary)	$1.1563
eu-central-1 EU (Frankfurt)	$1.2736
eu-west-1 EU (Ireland)	$1.1814
eu-west-2 EU (London)	$1.2401
eu-south-1 EU (Milan)	$1.2401
eu-west-3 EU (Paris)	$1.2401
eu-north-1 EU (Stockholm)	$1.1228
eu-south-2 Europe (Spain)	$1.1814
eu-central-2 Europe (Zurich)	$1.4010
me-central-1 Middle East (UAE)	$1.2996
sa-east-1 South America (Sao Paulo) Highest	$1.6842
us-east-1 US East (N. Virginia) Lowest	$1.0558
us-east-2 US East (Ohio) Lowest	$1.0558
us-west-1 US West (N. California)	$1.1730
us-west-2 US West (Oregon) Lowest	$1.0558

Windows — Available in all 27 regions
Region	On-Demand Price	% vs On-Demand Rate
af-south-1 Africa (Cape Town)	$2.1069
ap-south-2 Asia Pacific (Hyderabad)	$1.7885
ap-southeast-5 Asia Pacific (Malaysia)	$1.7818
ap-south-1 Asia Pacific (Mumbai)	$1.7885
ap-southeast-6 Asia Pacific (New Zealand)	$2.0277
ap-northeast-2 Asia Pacific (Seoul)	$1.9728
ap-southeast-1 Asia Pacific (Singapore)	$1.9728
ap-southeast-2 Asia Pacific (Sydney)	$1.9645
ap-northeast-1 Asia Pacific (Tokyo)	$1.9728
us-gov-east-1 AWS GovCloud (US-East)	$1.9645
us-gov-west-1 AWS GovCloud (US-West)	$1.9645
ca-central-1 Canada (Central)	$1.8555
ca-west-1 Canada West (Calgary)	$1.8555
eu-central-1 EU (Frankfurt)	$1.9728
eu-west-1 EU (Ireland)	$1.8806
eu-west-2 EU (London)	$1.9393
eu-south-1 EU (Milan)	$1.9393
eu-west-3 EU (Paris)	$1.9393
eu-north-1 EU (Stockholm)	$1.8220
eu-south-2 Europe (Spain)	$1.8806
eu-central-2 Europe (Zurich)	$2.1002
me-central-1 Middle East (UAE)	$1.9988
sa-east-1 South America (Sao Paulo) Highest	$2.3834
us-east-1 US East (N. Virginia) Lowest	$1.7550
us-east-2 US East (Ohio) Lowest	$1.7550
us-west-1 US West (N. California)	$1.8722
us-west-2 US West (Oregon) Lowest	$1.7550

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.4xlarge 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.