Amazon EC2 R9g and R9gd instances powered by AWS Graviton5 processors are now generally available | Amazon Web Services

SEATTLE — In a major leap forward for cloud-native infrastructure, Amazon Web Services (AWS) has announced the general availability of the new Amazon EC2 R9g and R9gd virtual server families. Driven by the cutting-edge AWS Graviton5 processor—heralded by the company as the most energy-efficient silicon architecture AWS has ever engineered—these memory-optimized instances deliver up to a 25% boost in raw compute performance over their predecessors.

Designed specifically to tackle the most demanding, memory-intensive computational environments, the R9g series introduces significant hardware enhancements, advanced networking capabilities, and a groundbreaking leap in cloud security through the Nitro Isolation Engine. For enterprise workloads spanning distributed relational databases, real-time analytics, and hyper-scaled microservices, the arrival of Graviton5 marks the dawn of a new era in sustainable, high-performance cloud computing.

Executive Overview: The Next Evolution of Custom Silicon

The relentless pace of optimization within modern enterprise architectures demands hardware that can scale horizontally and vertically without imposing exorbitant energy footprints or financial overheads. AWS has long positioned its custom-built Graviton processors at the center of this strategy. With the launch of the R9g and R9gd instances, the technology giant is addressing the heavy memory and computational demands of modern data processing pipelines.

Key Highlights at a Glance:

• Graviton5 Architecture: Delivers up to 25% better compute performance compared to the Graviton4-based R8g instances while consuming fewer overall resources.
• Specialized Variants: The R9g line is built for standard EBS-backed memory-intensive workflows, while the R9gd variant integrates ultra-fast, low-latency local NVMe-based SSD block-level storage.
• Massive Scalability: Ranging dynamically from nimble medium sizes all the way up to monstrous metal-48xl configurations sporting 192 vCPUs and 1,536 GiB of RAM.
• Mathematical Security: Integrates the Nitro Isolation Engine, pioneering mathematically proven cloud isolation through rigorous formal verification.
• Granular Control: Features Instance Bandwidth Configuration (IBC) to fine-tune network and storage throughput dynamically.

Detailed Chronology & Technical Architecture

The journey toward Graviton5 has been characterized by iterative, compounding breakthroughs in silicon design. Following the successful deployment of Graviton4 across various EC2 instance families earlier in the product lifecycle, AWS engineers focused their efforts on eliminating memory bottlenecks and shrinking thermal and power envelopes.

The Power of Graviton5

The architectural foundation of the R9g family rests on the innovations baked directly into the Graviton5 chip. By optimizing core microarchitecture, expanding the L3 cache, and accelerating memory bandwidth, AWS has directly targeted the pain points associated with memory-bound workloads.

When migrating from an R8g instance to an R9g equivalent, cloud architects will instantly notice:

1. Higher vCPU Performance: More transaction completions per second per core.
2. Accelerated Memory Subsystems: Reduced latency during memory read and write operations, vital for in-memory databases like Redis and Valkey.
3. Amplified Bandwidth: Higher maximum ceilings for both Amazon EBS and Amazon VPC networking.
4. Expanded L3 Cache: Significantly reduces main memory access latency, improving cache hit rates for complex algorithms.

R9g vs. R9gd: Choosing the Right Storage Paradigm

While both instance families share identical compute engines, networking stacks, and memory footprints, their storage architectures cater to distinct operational requirements:

• Amazon EC2 R9g (EBS-Optimized): Tailored for architectures where persistence, durability, and decoupled storage scaling via Amazon EBS are paramount. These instances are ideal for traditional enterprise applications, managed database systems, and stateless containerized architectures.
• Amazon EC2 R9gd (Local NVMe SSD-Backed): Engineered for workloads requiring blistering scratch space, local caching, or high-throughput temporary data processing. By incorporating locally attached, low-latency NVMe solid-state drives directly into the physical host, R9gd instances excel at powering open-source data engines, distributed real-time big data pipelines, and intensive caching grids that demand minimal I/O wait times.

Supporting Context & Metrics: Technical Specifications

To accommodate everything from lightweight microservices to massive distributed analytics engines, AWS has made R9g and R9gd instances available in 11 distinct sizes.

Amazon EC2 R9g Specifications (EBS-Only)

Amazon EC2 R9gd Specifications (Local NVMe SSD)

Advanced Network and Storage Control: Instance Bandwidth Configuration (IBC)

A standout capability of the R9g and R9gd product lines is the inclusion of Instance Bandwidth Configuration (IBC). Enterprise workloads often face conflicting demands regarding network traffic (Amazon VPC) and persistent storage operations (Amazon EBS).

With IBC, administrators are no longer locked into rigid default allocations. Instead, workloads can adjust the distribution of total available bandwidth between EBS and VPC connectivity by up to 25%. This fine-tuning capability ensures that data-heavy transactional databases or distributed caching tiers can prioritize the exact throughput pathways they require to avoid bottlenecks.

Security Paradigm: The Nitro Isolation Engine and Formal Verification

Security in multi-tenant cloud environments has historically relied on a combination of hardware partitioning and hypervisor management. AWS has long utilized the AWS Nitro System—a discrete hardware and software architecture that offloads virtualization, storage, and networking functions away from the host CPU to dedicated co-processors.

With the introduction of R9g and R9gd, AWS extends the capabilities of the Nitro Isolation Engine (NIE), first deployed earlier this year in the C9g and M9g families.

What Makes NIE Revolutionary?

• Minimalist API Mediation: NIE strictly controls and mediates all access paths to virtual machine memory, CPU register states, and physical I/O devices via a strictly minimized set of secure APIs.
• Mathematical Precision via Formal Verification: Moving beyond standard empirical testing—which can only prove that software or hardware works under predefined scenarios—AWS has applied formal verification to the hypervisor logic. This advanced mathematical methodology proves definitively that the system behaves precisely as intended across all possible states, making the Nitro System the world’s first formally verified cloud hypervisor.
• Near-Bare-Metal Performance: Because virtualization overhead is entirely offloaded to dedicated Nitro chips, customer instances enjoy near-bare-metal execution speeds while maintaining airtight security boundaries.

Ecosystem Readiness, Migration, and Developer Workflows

Transitioning enterprise applications to new instruction set architectures (ISAs) has historically required substantial engineering investment. However, the maturation of the Arm64 ecosystem—and AWS’s concerted tooling investments—means that migrating to Graviton5 is smoother than ever.

Broad Software Compatibility

R9g and R9gd instances support a vast array of operating systems and modern runtime environments, including:

• Linux Distributions: Amazon Linux 2023, Amazon Linux 2, Ubuntu 22.04 and newer, RHEL 8.4+, SUSE Linux Enterprise Server 15 SP3+, and Debian 12+.
• Programming Languages & Runtimes: Native support is baked into popular ecosystems including C/C++, Rust, Go, Java, Python, .NET Core, Node.js, Ruby, and PHP.
• Containerized Workloads: Multi-arch container images built for Arm64 run natively and seamlessly across Amazon EKS, Amazon ECS, and standard Kubernetes environments without requiring source code modifications.

Seamless Migration Pathways

For organizations currently utilizing R8g instances, moving to R9g is frictionless:

1. Zero Code Changes: Most applications require no code refactoring; developers simply select the equivalent R9g instance size.
2. Automated Tools: AWS provides targeted utilities such as the AWS Graviton Getting Started Guide, the Graviton Savings Dashboard for real-time cost tracking, and AWS Transform, which automates the code conversion process for legacy Java applications moving from x86 architectures to Arm-based environments.

Official Statements, Pricing, and Regional Availability

As enterprises face mounting pressure to balance economic efficiency with environmental sustainability, the introduction of Graviton5 arrives at a critical juncture.

"Today marks another major milestone in our commitment to delivering the world’s most performant and energy-efficient cloud infrastructure," noted Daniel Abib in the official AWS architectural briefing. "By pairing the raw efficiency of Graviton5 with the mathematical certainty of the Nitro Isolation Engine, R9g and R9gd provide our customers with an unmatched foundation for their most critical memory-intensive workloads."

Pricing and Procurement Options

R9g and R9gd instances are immediately available for deployment through multiple purchasing models designed to accommodate diverse financial strategies:

• Savings Plans and On-Demand instances for flexible scaling.
• Spot Instances for cost-optimized fault-tolerant batch processing.
• Dedicated Instances and Dedicated Hosts for strict regulatory or compliance mandates.

Initial Geographic Rollout

At launch, Amazon EC2 R9g and R9gd instances are accessible across key global infrastructure hubs, including:

• US East (N. Virginia, Ohio)
• US West (Oregon)
• Europe (Frankfurt)

Future Outlook: The Horizon of Cloud Architecture

The rollout of AWS Graviton5 and the R9g/R9gd instance families signals a fundamental shift in how cloud providers approach silicon design. By refusing to compromise between performance, security, and energy efficiency, AWS has set a towering standard for the industry.

As enterprises increasingly migrate heavy database clusters, real-time analytics engines, and microservice mesh networks to these new instances, the cumulative reduction in global data center power consumption will be profound. For cloud engineers, architects, and CTOs looking to future-proof their infrastructure, the adoption of R9g represents not merely an upgrade in compute metrics, but an essential step toward building resilient, secure, and sustainable digital enterprises.

To begin provisioning R9g and R9gd instances today, log into the Amazon EC2 Console or explore the detailed technical documentation on the Amazon EC2 R9g Product Page.