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r8gb.12xlarge by Amazon Web Services

r8gb.12xlarge is a Memory optimized [AWS Graviton processors] Gen8 12xlarge server offered by Amazon Web Services with 48 vCPUs, 384 GiB of memory and 0 GB of storage. The pricing starts at 1.4123 USD per hour.
48 vCPU
384 GiB Memory
Spare SCore
81876
(All-cores)
1707
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
r8gb.12xlarge
Description
Memory optimized [AWS Graviton processors] Gen8 12xlarge
Family
r8gb
Hw Virt
Status
active
Observed At
2026-07-28T00:08:50.055787

Availability

REGION / IDSPOTONDEMAND
Oregon (US) / us-west-2
1.531067 USD/h 4.3723 USD/h
Northern Virgina (US) / us-east-1
1.860175 USD/h 4.3723 USD/h

Processor

vCPUs
48
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
48
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
3 MiB
CPU L1I Cache
64 KiB
CPU L1I Cache Total
3 MiB
CPU L2 Cache
2 MiB
CPU L2 Cache Total
96 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
48
Scalability
100

System Resources and Accelerators

MEMORY
Memory Amount
384 GiB
Memory Amount Actual
378 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
      100 Gbps
      Network Speed Max
      100 Gbps
      Network Storage Speed Baseline
      75 Gbps
      Network Storage Speed Max
      75 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      Server Description

      An arm64 memory-optimized instance featuring forty-eight dedicated physical cores and top-tier memory bandwidth for data-intensive workloads.

      Memory OptimizedGeneral Purpose

      Amazon Web Services r8gb.12xlarge is an arm64 memory-optimized instance featuring 48 dedicated physical cores powered by AWS Graviton ARMv9 Neoverse-V2 processors running at 2.8 GHz. Equipped with 384.0 GB of RAM, it provides 8.0 GB of memory per core alongside a baseline network bandwidth of 100 Gbps, though it lacks local storage. Benchmarks show top-tier memory bandwidth, with large-block reads at 434.99 GB/sec and writes at 216.28 GB/sec, alongside strong multi-core performance in Geekbench and stress-ng. Passmark database operations and Redis SET operations also rank highly, reflecting strong throughput capabilities. While single-core performance remains average, the instance offers high memory density and predictable compute performance via dedicated cores. It is suited for in-memory databases, caching layers, and memory-intensive enterprise workloads.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      3.6Score
      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) 9,480,134 ops/sec 1,896,415 ops/sec 5 50.00% 50.00% +124.00%
      Redis RPS (pipeline=16, SET) 53,127,820 ops/sec 11,539,523 ops/sec 4.6 20.00% 20.00% +35.70%
      PassMark Memory Mark (composite) 3,444 2,411 1.43 10.00% 10.00% +3.64%
      Memory bandwidth (read, 16 MB ~ L3) 500,949 MB/sec 107,368 MB/sec 4.67 10.00% 10.00% +16.70%
      PassMark single-thread CPU 1,944 Mops/s 2,363 Mops/s 0.823 10.00% 10.00% -1.93%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 1,890

      Geekbench Multi-Core

      Score: 23,666

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 36083
      Compression
      		 318637
      Encryption
      		 9036
      Extended Instructions
      		 44176
      Floating Point Maths
      		 290979
      Integer Maths
      		 250440
      Physics
      		 13475
      Prime Numbers
      		 583
      Single Threaded
      		 1944
      String Sorting
      		 221254

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 3444
      Database Operations
      		 47921
      Memory Latency
      		 46
      Memory Read Cached
      		 21195
      Memory Read Uncached
      		 20298
      Memory Write
      		 21157

      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
      r8gb.medium 18 GiB0
      r8gb.large 216 GiB0
      r8gb.xlarge 432 GiB0
      r8gb.2xlarge 864 GiB0
      r8gb.4xlarge 16128 GiB0
      r8gb.8xlarge 32256 GiB0
      r8gb.16xlarge 64512 GiB0

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      r8gb.12xlarge FAQs