r8gn.4xlarge by Amazon Web Services

r8gn.4xlarge is a Memory optimized [AWS Graviton processors] [Network and EBS optimized] Gen8 4xlarge server offered by Amazon Web Services with 16 vCPUs, 128 GiB of memory and 0 GB of storage. The pricing starts at 0.4518 USD per hour.
16 vCPU
128 GiB Memory
Spare SCore
27,292
(All-cores)
1,707
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
r8gn.4xlarge
Description
Memory optimized [AWS Graviton processors] [Network and EBS optimized] Gen8 4xlarge
Family
r8gn
Hw Virt
Status
active
Observed At
2026-09-21T18:37:37.717818

Availability

REGION / IDSPOTONDEMAND
Northern Virgina (US) / us-east-1
0.6936 USD/h 1.4574 USD/h
Oregon (US) / us-west-2
0.578567 USD/h 1.4574 USD/h

Processor

vCPUs
16
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
16
CPU Speed
2.8 GHz
CPU Architecture
arm64
CPU Manufacturer
AWS
CPU Family
ARMv9
CPU Model
Neoverse-V2
CPU L1D Cache
64 KiB
CPU L1D Cache Total
1 MiB
CPU L1I Cache
64 KiB
CPU L1I Cache Total
1 MiB
CPU L2 Cache
2 MiB
CPU L2 Cache Total
32 MiB
CPU L3 Cache
36 MiB
CPU L3 Cache Total
36 MiB
CPU Flags
fp, asimd, evtstrm, aes, pmull, sha1, sha2, crc32, atomics, fphp, asimdhp, cpuid, asimdrdm, jscvt, fcma, lrcpc, dcpop, sha3, asimddp, sha512, sve, asimdfhm, dit, uscat, ilrcpc, flagm, sb, paca, pacg, dcpodp, sve2, sveaes, svepmull, svebitperm, svesha3, flagm2, frint, svei8mm, svebf16, i8mm, bf16, dgh, rng, bti
Ecpus
16
Scalability
100

System Resources and Accelerators

MEMORY
Memory Amount
128 GiB
Memory Amount Actual
126 GiB
GPU
GPU Count
0
GPU Memory Min
0 MiB
GPU Memory Total
0 MiB
GPUs
    STORAGE
    Storage Size
    0 GB
    Storages
      NETWORK
      Network Speed Baseline
      50 Gbps
      Network Speed Max
      50 Gbps
      Network Storage Speed Baseline
      10 Gbps
      Network Storage Speed Max
      10 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      Server Description

      An ARM64 memory-optimized instance delivering high-bandwidth memory performance and dedicated physical cores for database and caching workloads.

      Memory OptimizedStorage & Database

      Amazon Web Services r8gn.4xlarge is a memory-optimized server instance powered by 16 dedicated ARM64 physical cores on the AWS Graviton ARMv9 Neoverse-V2 processor running at 2.8 GHz. It features 128.0 GB of RAM, yielding an 8.0 GB per core ratio, and operates on the Nitro hypervisor with a 50 Gbps baseline network bandwidth. The instance does not include local storage or GPU hardware. Benchmark data highlights top-tier memory performance, with Passmark memory scores in the top 10% and strong uncached large-block memory read speeds of 285.68 GB/sec. Database operations also perform strongly, while CPU-bound benchmarks and LLM inference tasks remain average to poor. This profile makes the r8gn.4xlarge highly efficient for memory-intensive applications, caching layers, and database workloads that benefit from high memory bandwidth and dedicated ARM cores.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      1.55Score
      Precomputed compound score for Cache Intensive workloads. A weighted average (geometric mean) of benchmark scores compared to their medians: score = ∏ (x_i / m_i)^(w_i / Σw). The score of 1.0 represents a synthetic baseline server with the median performance of each component benchmark; 0.5 means roughly half the performance; and 2.0 means twice the performance of that reference profile. Component weights: 50% Redis RPS (pipeline=1, SET), 20% Redis RPS (pipeline=16, SET), 10% PassMark Memory Mark (composite), 10% Memory bandwidth (read, 16 MB ~ L3), 10% PassMark single-thread CPU. Rationale for component selection: In-memory key-value store workload, mixing direct Redis performance metrics with memory speed and latency benchmarks, and single-core CPU performance profiles.
      Component Score Weight Impact
      Raw Reference Normalized Target Actual
      Redis RPS (pipeline=1, SET) 3,103,823 ops/sec 1,919,696 ops/sec 1.62 50.00% 50.00% +27.30%
      Redis RPS (pipeline=16, SET) 17,571,633 ops/sec 11,736,081 ops/sec 1.5 20.00% 20.00% +8.45%
      PassMark Memory Mark (composite) 3,317 2,418 1.37 10.00% 10.00% +3.20%
      Memory bandwidth (read, 16 MB ~ L3) 315,205 MB/sec 108,260 MB/sec 2.91 10.00% 10.00% +11.30%
      PassMark single-thread CPU 1,943 Mops/s 2,365 Mops/s 0.822 10.00% 10.00% -1.94%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 1,823

      Geekbench Multi-Core

      Score: 15,846

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 14591
      Compression
      		 106269
      Encryption
      		 3035
      Extended Instructions
      		 14724
      Floating Point Maths
      		 96960
      Integer Maths
      		 83469
      Physics
      		 4811
      Prime Numbers
      		 240
      Single Threaded
      		 1943
      String Sorting
      		 74238

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 3317
      Database Operations
      		 24245
      Memory Latency
      		 47
      Memory Read Cached
      		 21151
      Memory Read Uncached
      		 19621
      Memory Write
      		 21266

      Stress-ng Raw Scores

      Stress-ng Relative Multicore Performance

      LLM Inference Speed for Prompt Processing

      LLM Inference Speed for Text Generation

      Static Web Server

      Redis

      Alternatives

      Servers of the Same Family

      INSTANCEvCPUsMEMORYGPUs
      r8gn.medium 18 GiB0
      r8gn.large 216 GiB0
      r8gn.xlarge 432 GiB0
      r8gn.2xlarge 864 GiB0
      r8gn.8xlarge 32256 GiB0
      r8gn.12xlarge 48384 GiB0
      r8gn.16xlarge 64512 GiB0

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      r8gn.4xlarge FAQs