r5a.8xlarge by Amazon Web Services

r5a.8xlarge is a Memory optimized [AMD processors] Gen5 8xlarge server offered by Amazon Web Services with 32 vCPUs, 256 GiB of memory and 0 GB of storage. The pricing starts at 0.4326 USD per hour.
32 vCPU
256 GiB Memory
Spare SCore
9,436
(All-cores)
591
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
r5a.8xlarge
Description
Memory optimized [AMD processors] Gen5 8xlarge
Family
r5a
Hw Virt
Status
active
Observed At
2026-09-14T01:58:16.709962

Availability

REGION / IDSPOTONDEMAND
Mumbai (IN) / ap-south-1
0.589967 USD/h 1.144 USD/h
Ohio (US) / us-east-2
0.654333 USD/h 1.808 USD/h
Northern Virgina (US) / us-east-1
0.75236 USD/h 1.808 USD/h
Oregon (US) / us-west-2
0.770475 USD/h 1.808 USD/h
Quebec (CA) / ca-central-1
0.7466 USD/h 1.984 USD/h
California (US) / us-west-1
0.7391 USD/h 2.016 USD/h
Dublin (IE) / eu-west-1
0.935467 USD/h 2.032 USD/h
Milan (IT) / eu-south-1
0.5528 USD/h 2.128 USD/h
London (GB) / eu-west-2
0.6575 USD/h 2.128 USD/h
Paris (FR) / eu-west-3
0.739267 USD/h 2.128 USD/h
Seoul (KR) / ap-northeast-2
0.9136 USD/h 2.176 USD/h
Singapore (SG) / ap-southeast-1
1.130533 USD/h 2.176 USD/h
Sydney (AU) / ap-southeast-2
1.126733 USD/h 2.176 USD/h
Tokyo (JP) / ap-northeast-1
0.842733 USD/h 2.192 USD/h
Frankfurt (DE) / eu-central-1
0.9831 USD/h 2.192 USD/h
Sao Paulo (BR) / sa-east-1
0.56635 USD/h 2.896 USD/h

Processor

vCPUs
32
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
16
CPU Speed
2.5 GHz
CPU Architecture
x86_64
CPU Manufacturer
AMD
CPU Family
EPYC
CPU Model
7571
CPU L1D Cache
32 KiB
CPU L1D Cache Total
512 KiB
CPU L1I Cache
64 KiB
CPU L1I Cache Total
1 MiB
CPU L2 Cache
512 KiB
CPU L2 Cache Total
8 MiB
CPU L3 Cache
8 MiB
CPU L3 Cache Total
32 MiB
CPU Flags
fpu, vme, de, pse, tsc, msr, pae, mce, cx8, apic, sep, mtrr, pge, mca, cmov, pat, pse36, clflush, mmx, fxsr, sse, sse2, ht, syscall, nx, mmxext, fxsr_opt, pdpe1gb, rdtscp, lm, constant_tsc, rep_good, nopl, nonstop_tsc, cpuid, extd_apicid, amd_dcm, aperfmperf, tsc_known_freq, pni, pclmulqdq, ssse3, fma, cx16, sse4_1, sse4_2, movbe, popcnt, aes, xsave, avx, f16c, rdrand, hypervisor, lahf_lm, cmp_legacy, cr8_legacy, abm, sse4a, misalignsse, 3dnowprefetch, topoext, perfctr_core, vmmcall, fsgsbase, bmi1, avx2, smep, bmi2, rdseed, adx, smap, clflushopt, sha_ni, xsaveopt, xsavec, xgetbv1, clzero, xsaveerptr, arat, npt, nrip_save
Ecpus
16
Scalability
100

System Resources and Accelerators

MEMORY
Memory Amount
256 GiB
Memory Amount Actual
256 GiB
Memory Generation
DDR4
Memory Speed
3200 Mhz
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
      7.5 Gbps
      Network Speed Max
      10 Gbps
      Network Storage Speed Baseline
      4.75 Gbps
      Network Storage Speed Max
      4.75 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      Server Description

      A memory-optimized instance featuring high DDR4 memory density and balanced multi-core performance for memory-intensive, non-compute-bound workloads.

      Memory OptimizedGeneral Purpose

      Amazon Web Services r5a.8xlarge is an x86_64 memory-optimized instance featuring 32 vCPUs and 16 physical cores powered by an AMD EPYC 7571 processor running at 2.5 GHz. Built on the Nitro hypervisor, it includes 256.0 GB of DDR4 memory at 3 GHz, providing a high memory-to-vCPU ratio of 8 GB per core. The instance lacks local storage and GPU accelerators. Performance benchmarks reveal a distinct tradeoff: single-core metrics, including Geekbench and compression tasks, fall into the bottom 10%, whereas multi-core and memory bandwidth benchmarks consistently rank in the middle 50%. This profile makes the r5a.8xlarge qualitatively cost-effective for memory-dense, multi-threaded workloads such as in-memory databases, caching layers, and general-purpose backend applications that do not demand high single-threaded compute velocity.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      0.809Score
      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) 1,661,019 ops/sec 1,917,397 ops/sec 0.866 50.00% 50.00% -6.94%
      Redis RPS (pipeline=16, SET) 11,140,919 ops/sec 11,681,410 ops/sec 0.954 20.00% 20.00% -0.94%
      PassMark Memory Mark (composite) 2,065 2,418 0.854 10.00% 10.00% -1.57%
      Memory bandwidth (read, 16 MB ~ L3) 56,122 MB/sec 108,140 MB/sec 0.519 10.00% 10.00% -6.35%
      PassMark single-thread CPU 1,446 Mops/s 2,365 Mops/s 0.611 10.00% 10.00% -4.81%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 730

      Geekbench Multi-Core

      Score: 6,270

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 22397
      Compression
      		 353928
      Encryption
      		 25944
      Extended Instructions
      		 13169
      Floating Point Maths
      		 43698
      Integer Maths
      		 82742
      Physics
      		 1728
      Prime Numbers
      		 73
      Single Threaded
      		 1446
      String Sorting
      		 47773

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2065
      Database Operations
      		 7416
      Memory Latency
      		 65
      Memory Read Cached
      		 14852
      Memory Read Uncached
      		 10695
      Memory Write
      		 8162

      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
      r5a.large 216 GiB0
      r5a.xlarge 432 GiB0
      r5a.2xlarge 864 GiB0
      r5a.4xlarge 16128 GiB0
      r5a.12xlarge 48384 GiB0
      r5a.16xlarge 64512 GiB0
      r5a.24xlarge 96768 GiB0

      Similar Servers

      INSTANCEVENDORvCPUsMEMORYGPUs

      r5a.8xlarge FAQs