r5a.4xlarge by Amazon Web Services

r5a.4xlarge is a Memory optimized [AMD processors] Gen5 4xlarge server offered by Amazon Web Services with 16 vCPUs, 128 GiB of memory and 0 GB of storage. The pricing starts at 0.2136 USD per hour.
16 vCPU
128 GiB Memory
Spare SCore
4,724
(All-cores)
591
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
r5a.4xlarge
Description
Memory optimized [AMD processors] Gen5 4xlarge
Family
r5a
Hw Virt
Status
active
Observed At
2026-10-27T00:00:31.274316

Availability

REGION / IDSPOTONDEMAND
Mumbai (IN) / ap-south-1
0.2946 USD/h 0.572 USD/h
Ohio (US) / us-east-2
0.362467 USD/h 0.904 USD/h
Northern Virgina (US) / us-east-1
0.40768 USD/h 0.904 USD/h
Oregon (US) / us-west-2
0.4363 USD/h 0.904 USD/h
Quebec (CA) / ca-central-1
0.3873 USD/h 0.992 USD/h
California (US) / us-west-1
0.29295 USD/h 1.008 USD/h
Dublin (IE) / eu-west-1
0.503567 USD/h 1.016 USD/h
Milan (IT) / eu-south-1
0.255567 USD/h 1.064 USD/h
Paris (FR) / eu-west-3
0.4045 USD/h 1.064 USD/h
London (GB) / eu-west-2
0.420833 USD/h 1.064 USD/h
Seoul (KR) / ap-northeast-2
0.4079 USD/h 1.088 USD/h
Singapore (SG) / ap-southeast-1
0.5313 USD/h 1.088 USD/h
Sydney (AU) / ap-southeast-2
0.531033 USD/h 1.088 USD/h
Tokyo (JP) / ap-northeast-1
0.416833 USD/h 1.096 USD/h
Frankfurt (DE) / eu-central-1
0.453533 USD/h 1.096 USD/h
Sao Paulo (BR) / sa-east-1
0.23915 USD/h 1.448 USD/h

Processor

vCPUs
16
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
8
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
256 KiB
CPU L1I Cache
64 KiB
CPU L1I Cache Total
512 KiB
CPU L2 Cache
512 KiB
CPU L2 Cache Total
4 MiB
CPU L3 Cache
8 MiB
CPU L3 Cache Total
16 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, 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
8
Scalability
50

System Resources and Accelerators

MEMORY
Memory Amount
128 GiB
Memory Amount Actual
128 GiB
Memory Generation
DDR4
Memory Speed
2667 Mhz
ACCELERATORS
Accelerator Count
0
Accelerator Memory Min
0 MiB
Accelerator Memory Total
0 MiB
Accelerators
    STORAGE
    Storage Size
    0 GB
    Storages
      NETWORK
      Network Speed Baseline
      5 Gbps
      Network Speed Max
      10 Gbps
      Network Storage Speed Baseline
      2.88 Gbps
      Network Storage Speed Max
      2.88 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      Server Description

      A memory-optimized instance featuring a high RAM-to-vCPU ratio and dedicated AMD EPYC processors for memory-intensive enterprise workloads.

      Memory OptimizedGeneral Purpose

      Amazon Web Services r5a.4xlarge is a memory-optimized instance featuring 16 vCPUs and 128.0 GB of DDR4 RAM. Powered by an AMD EPYC 7571 processor running at 2.5 GHz, this x86_64 instance utilizes the AWS Nitro hypervisor. It lacks local storage and GPU accelerators, relying on a 5 Gbps baseline network speed. Performance benchmarks show average results in multi-core operations, software compilation, and database tasks, though single-core compute and large-block memory write speeds are relatively weak. The high memory-to-vCPU ratio makes it qualitatively cost-effective for memory-intensive applications that do not demand high single-thread performance. It is suited for database operations, caching layers, and memory-bound enterprise workloads.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      0.47Score
      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) 881,981 ops/sec 1,918,343 ops/sec 0.46 50.00% 50.00% -32.00%
      Redis RPS (pipeline=16, SET) 5,650,830 ops/sec 11,704,734 ops/sec 0.47 20.00% 20.00% -14.00%
      PassMark Memory Mark (composite) 1,974 2,416 0.83 10.00% 10.00% -1.80%
      Memory bandwidth (read, 16 MB ~ L3) 28,274 MB/sec 108,420 MB/sec 0.25 10.00% 10.00% -13.00%
      PassMark single-thread CPU 1,445 Mops/s 2,365 Mops/s 0.58 10.00% 10.00% -5.30%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 727

      Geekbench Multi-Core

      Score: 4,602

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 12,529
      Compression
      		 176,391
      Encryption
      		 12,971
      Extended Instructions
      		 6,556
      Floating Point Maths
      		 21,848
      Integer Maths
      		 41,423
      Physics
      		 871
      Prime Numbers
      		 37
      Single Threaded
      		 1,445
      String Sorting
      		 24,122

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 1,974
      Database Operations
      		 3,729
      Memory Latency
      		 63
      Memory Read Cached
      		 14,789
      Memory Read Uncached
      		 11,105
      Memory Write
      		 8,075

      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

      INSTANCEvCPUsMEMORYAccelerators
      r5a.large 216 GiB0
      r5a.xlarge 432 GiB0
      r5a.2xlarge 864 GiB0
      r5a.8xlarge 32256 GiB0
      r5a.12xlarge 48384 GiB0
      r5a.16xlarge 64512 GiB0
      r5a.24xlarge 96768 GiB0

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      r5a.4xlarge FAQs