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r5a.16xlarge by Amazon Web Services

r5a.16xlarge is a Memory optimized [AMD processors] Gen5 16xlarge server offered by Amazon Web Services with 64 vCPUs, 512 GiB of memory and 0 GB of storage. The pricing starts at 0.6062 USD per hour.
64 vCPU
512 GiB Memory
Spare SCore
18881
(All-cores)
591
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
r5a.16xlarge
Description
Memory optimized [AMD processors] Gen5 16xlarge
Family
r5a
Hw Virt
Status
active
Observed At
2026-08-12T09:13:52.174736

Availability

REGION / IDSPOTONDEMAND
Mumbai (IN) / ap-south-1
0.9738 USD/h 2.288 USD/h
Northern Virgina (US) / us-east-1
1.37344 USD/h 3.616 USD/h
Oregon (US) / us-west-2
1.367075 USD/h 3.616 USD/h
Ohio (US) / us-east-2
1.313433 USD/h 3.616 USD/h
Quebec (CA) / ca-central-1
1.54015 USD/h 3.968 USD/h
California (US) / us-west-1
1.19975 USD/h 4.032 USD/h
Dublin (IE) / eu-west-1
1.8527 USD/h 4.064 USD/h
London (GB) / eu-west-2
0.9717 USD/h 4.256 USD/h
Paris (FR) / eu-west-3
0.960033 USD/h 4.256 USD/h
Milan (IT) / eu-south-1
0.9906 USD/h 4.256 USD/h
Seoul (KR) / ap-northeast-2
1.40975 USD/h 4.352 USD/h
Sydney (AU) / ap-southeast-2
1.550067 USD/h 4.352 USD/h
Singapore (SG) / ap-southeast-1
2.129533 USD/h 4.352 USD/h
Tokyo (JP) / ap-northeast-1
1.038067 USD/h 4.384 USD/h
Frankfurt (DE) / eu-central-1
1.532767 USD/h 4.384 USD/h
Sao Paulo (BR) / sa-east-1
1.51945 USD/h 5.792 USD/h

Processor

vCPUs
64
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
32
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
1 MiB
CPU L1I Cache
64 KiB
CPU L1I Cache Total
2 MiB
CPU L2 Cache
512 KiB
CPU L2 Cache Total
16 MiB
CPU L3 Cache
8 MiB
CPU L3 Cache Total
64 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
31.9
Scalability
99.69

System Resources and Accelerators

MEMORY
Memory Amount
512 GiB
Memory Amount Actual
512 GiB
Memory Generation
DDR4
Memory Speed
2667 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
      12 Gbps
      Network Speed Max
      12 Gbps
      Network Storage Speed Baseline
      9.5 Gbps
      Network Storage Speed Max
      9.5 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      Server Description

      A memory-optimized virtual server featuring high-density DDR4 RAM and multi-core AMD processors for parallelized, memory-intensive enterprise workloads.

      Memory OptimizedGeneral Purpose

      Amazon Web Services r5a.16xlarge is a memory-optimized instance featuring 64 vCPUs, 32 physical AMD EPYC 7571 cores, and 512.0 GB of DDR4 memory. Operating on the Nitro hypervisor, it delivers a baseline network bandwidth of 12 Gbps but does not include local storage. Performance benchmarks indicate a clear tradeoff: single-core execution speeds are low, placing in the bottom 10% of tested systems, while multi-core operations and memory bandwidth consistently rank in the average tier. Notably, the instance exhibits strong cryptographic performance, placing in the top 25% for encryption tests. Qualitatively, the r5a.16xlarge provides a cost-efficient profile for memory-dense deployments that do not demand high single-threaded performance. It is suited for parallelized, memory-intensive workloads such as in-memory databases, caching layers, and large-scale enterprise applications.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      1.39Score
      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) 3,228,831 ops/sec 1,910,660 ops/sec 1.69 50.00% 50.00% +30.00%
      Redis RPS (pipeline=16, SET) 21,688,833 ops/sec 11,608,287 ops/sec 1.87 20.00% 20.00% +13.30%
      PassMark Memory Mark (composite) 2,163 2,416 0.895 10.00% 10.00% -1.10%
      Memory bandwidth (read, 16 MB ~ L3) 111,697 MB/sec 107,896 MB/sec 1.04 10.00% 10.00% +0.39%
      PassMark single-thread CPU 1,448 Mops/s 2,364 Mops/s 0.612 10.00% 10.00% -4.79%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 727

      Geekbench Multi-Core

      Score: 7,518

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 36740
      Compression
      		 697786
      Encryption
      		 51705
      Extended Instructions
      		 25881
      Floating Point Maths
      		 87355
      Integer Maths
      		 165840
      Physics
      		 3458
      Prime Numbers
      		 147
      Single Threaded
      		 1448
      String Sorting
      		 92391

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2163
      Database Operations
      		 14868
      Memory Latency
      		 63
      Memory Read Cached
      		 14848
      Memory Read Uncached
      		 10940
      Memory Write
      		 8254

      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.8xlarge 32256 GiB0
      r5a.12xlarge 48384 GiB0
      r5a.24xlarge 96768 GiB0

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      r5a.16xlarge FAQs