AWS Unveils Next-Generation Power: Amazon EC2 R9g and R9gd Instances Powered by Graviton5
SEATTLE — Amazon Web Services (AWS), an Amazon.com company, has officially announced the general availability of the Amazon EC2 R9g and R9gd instance families. Driven by the brand-new AWS Graviton5 processors—touted as the most energy-efficient silicon ever designed by the cloud giant—these memory-optimized instances promise a paradigm shift for high-performance computing, large-scale databases, and data-intensive modern architectures.
The launch marks a significant milestone in custom silicon evolution, delivering up to a 25% boost in raw compute performance compared to the previous-generation Graviton4-powered R8g instances. Designed to handle demanding, memory-bound workloads without sacrificing energy efficiency, the R9g and R9gd lines aim to lower operational costs while drastically improving throughput for enterprises worldwide.
Main Facts
The introduction of the R9g and R9gd instance families brings a wave of cutting-edge hardware enhancements engineered to optimize performance, networking, and security at scale.
- Graviton5 Architecture: At the core of the R9g and R9gd instances are the new AWS Graviton5 processors. These chips deliver up to 25% better compute performance than their predecessors while maintaining superior energy efficiency.
- Workload Versatility: The R9g line is explicitly tailored for memory-intensive tasks. This includes distributed databases, high-speed in-memory caches (such as Valkey, Redis, and Memcached), real-time big data analytics, containerized microservices (Kubernetes, Docker, Amazon EKS, ECS), and applications built in modern programming languages like C/C++, Rust, Go, Java, Python, .NET Core, Node.js, Ruby, and PHP.
- Local NVMe Storage Variant: The R9gd variant incorporates high-speed, low-latency local NVMe-based SSD block-level storage directly attached to the host. This makes it ideal for distributed open-source databases and caching engines that require massive amounts of temporary, high-throughput scratch space.
- Advanced Networking and EBS Bandwidth: R9g instances offer higher network throughput, improved Amazon Elastic Block Store (EBS) bandwidth, a larger Level 3 (L3) cache, and faster memory per vCPU compared to the R8g family.
- Instance Bandwidth Configuration (IBC): Both instance types support IBC, enabling administrators to dynamically adjust the allocation of network bandwidth between Amazon EBS and Amazon VPC networking by up to 25%. This fine-tuning capability ensures predictable performance for workloads with fluctuating I/O demands.
- Mathematical Security with Nitro Isolation Engine (NIE): Operating on the AWS Nitro System, these instances feature the Nitro Isolation Engine. NIE leverages formal verification—a rigorous mathematical technique—to formally prove that virtual machine isolation, memory mediation, CPU register states, and I/O devices behave securely and as intended under all conditions.
Chronology
The path to the general availability of AWS Graviton5 and the R9g instance family represents years of methodical hardware engineering and software ecosystem maturation.
- The Graviton Foundation (2018): AWS introduced its first custom ARM-based processor, the Graviton, establishing a new vector for cloud-native performance and cost-efficiency.
- Iterative Scaling (2020–2023): Successive generations—Graviton2, Graviton3, and Graviton4—rapidly expanded enterprise adoption, proving that custom silicon could match and often exceed traditional x86 alternatives for general-purpose, compute-intensive, and memory-optimized workloads. Earlier iterations, including the C9g and M9g instances, debuted foundational architectural upgrades earlier in the year.
- Introduction of the Nitro Isolation Engine: AWS integrated formal verification standards into its proprietary Nitro System, setting a new benchmark for cloud hypervisor security and laying the operational groundwork for the ninth-generation instance rollout.
- General Availability (Late 2025): AWS officially launches the R9g and R9gd families, making Graviton5-powered memory-optimized instances globally accessible across key regions in North America and Europe.
Supporting Data
The R9g and R9gd portfolios offer extensive flexibility, scaling from lightweight microservices up to massive, bare-metal enterprise deployments. Available in 11 distinct sizes, the configurations cater to diverse infrastructure footprints.
Amazon EC2 R9g Specifications (EBS-Only)
| Instance Size | vCPUs | Memory (GiB) | Instance Storage | Network Bandwidth (Gbps) | EBS Bandwidth (Gbps) |
|---|---|---|---|---|---|
| r9g.medium | 1 | 8 | EBS-Only | Up to 15 | Up to 12 |
| r9g.large | 2 | 16 | EBS-Only | Up to 15 | Up to 12 |
| r9g.xlarge | 4 | 32 | EBS-Only | Up to 15 | Up to 12 |
| r9g.2xlarge | 8 | 64 | EBS-Only | Up to 17 | Up to 12 |
| r9g.4xlarge | 16 | 128 | EBS-Only | Up to 17 | Up to 12 |
| r9g.8xlarge | 32 | 256 | EBS-Only | 17 | 12 |
| r9g.12xlarge | 48 | 384 | EBS-Only | 25 | 18 |
| r9g.16xlarge | 64 | 512 | EBS-Only | 34 | 24 |
| r9g.24xlarge | 96 | 768 | EBS-Only | 50 | 36 |
| r9g.48xlarge | 192 | 1536 | EBS-Only | 100 | 72 |
| r9g.metal-48xl | 192 | 1536 | EBS-Only | 100 | 72 |
Amazon EC2 R9gd Specifications (Local NVMe SSD Storage)
| Instance Size | vCPUs | Memory (GiB) | Instance Storage (NVMe SSD) | Network Bandwidth (Gbps) | EBS Bandwidth (Gbps) |
|---|---|---|---|---|---|
| r9gd.medium | 1 | 8 | 1 x 59 GB | Up to 15 | Up to 12 |
| r9gd.large | 2 | 16 | 1 x 118 GB | Up to 15 | Up to 12 |
| r9gd.2xlarge | 8 | 64 | 1 x 474 GB | Up to 17 | Up to 12 |
| r9gd.4xlarge | 16 | 128 | 1 x 950 GB | Up to 17 | Up to 12 |
| r9gd.8xlarge | 32 | 256 | 1 x 1900 GB | 17 | 12 |
| r9gd.12xlarge | 48 | 384 | 3 x 950 GB | 25 | 18 |
| r9gd.16xlarge | 64 | 512 | 1 x 3800 GB | 34 | 24 |
| r9gd.24xlarge | 96 | 768 | 3 x 1900 GB | 50 | 36 |
| r9gd.48xlarge | 192 | 1536 | 3 x 3800 GB | 100 | 72 |
| r9gd.metal-48xl | 192 | 1536 | 3 x 3800 GB | 100 | 72 |
Regional Availability & Pricing Models
At launch, the R9g and R9gd instances are immediately accessible in select AWS Regions:
- US East: N. Virginia, Ohio
- US West: Oregon
- Europe: Frankfurt
Customers can procure these instances via multiple flexible purchase structures, including On-Demand, Savings Plans, Spot Instances, Dedicated Instances, and Dedicated Hosts.
Official Responses and Strategic Vision
In his official technical announcement, Daniel Abib, representing the AWS engineering team, highlighted the frictionless nature of upgrading to the new architecture.
"If you’re migrating from R8g instances today, R9g gives you more performance per vCPU with faster memory, higher network and Amazon EBS bandwidth, and a larger L3 cache, all while using less energy," Abib noted.
AWS has emphasized that zero code modifications are required for the vast majority of applications currently running on ARM-based architectures. By simply selecting an equivalent R9g instance size, development teams can immediately harvest performance dividends. Furthermore, for containerized deployments, multi-architecture container images engineered for Arm64 run natively and seamlessly across Amazon EKS, Amazon ECS, and standard Kubernetes distributions.
To smooth the migration path for enterprises transitioning legacy workloads—such as Java applications migrating from x86 platforms—AWS provides automated toolchains, including the AWS Graviton Getting Started Guide, the Graviton Savings Dashboard, and AWS Transform.
Implications for the Cloud Ecosystem
The introduction of the R9g and R9gd instances powered by Graviton5 carries profound implications for enterprise IT strategy, infrastructure economics, and cloud security standards.
1. Redefining Cloud Economics and Sustainability
As data centers face mounting energy constraints and rising power costs, the delivery of AWS’s most energy-efficient processor to date represents a major victory for corporate sustainability goals. Companies striving to achieve net-zero carbon footprints can scale their memory-intensive applications while directly reducing their scope 3 greenhouse gas emissions associated with cloud infrastructure.
2. Setting a New Benchmark for Hypervisor Security
The incorporation of the Nitro Isolation Engine with formal verification transforms how cloud security is audited. Rather than relying solely on empirical testing—which can miss edge cases—formal verification applies mathematical proof to guarantee that hypervisor boundaries remain impenetrable. This breakthrough establishes a new industry benchmark for multi-tenant cloud isolation, reassuring regulated industries such as finance, healthcare, and government sectors that their high-density workloads remain strictly segregated.
3. Accelerated Arm Adoption in Enterprise Software
With robust, native support spanning major Linux distributions (Amazon Linux 2023, Ubuntu, RHEL, SLES, Debian) and virtually all popular programming languages (including Java, Python, Go, and Rust), the barrier to entry for ARM-based infrastructure has effectively vanished. As performance margins over traditional x86 architecture continue to widen, enterprise architects are increasingly treating ARM as the default choice for performance-critical cloud workloads.
Getting Started
Developers and systems architects can immediately provision R9g and R9gd instances via the Amazon EC2 console utilizing supported Arm-based AMIs. For advanced integrations, API queries, and troubleshooting, AWS encourages the use of the AWS MCP Server and associated plugins with preferred AI tooling, alongside community engagement via AWS re:Post for Amazon EC2.
