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r6a.16xlarge by Amazon Web Services

r6a.16xlarge is a Memory optimized [AMD processors] Gen6 16xlarge server offered by Amazon Web Services with 64 vCPUs, 512 GiB of memory and 0 GB of storage. The pricing starts at 0.2753 USD per hour.
64 vCPU
512 GiB Memory
Spare SCore
95673
(All-cores)
2992
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
r6a.16xlarge
Description
Memory optimized [AMD processors] Gen6 16xlarge
Family
r6a
Hw Virt
Status
active
Observed At
2026-08-01T12:14:18.521358

Availability

REGION / IDSPOTONDEMAND
Hyderabad (IN) / ap-south-2
0.708867 USD/h 2.288 USD/h
Mumbai (IN) / ap-south-1
1.0179 USD/h 2.288 USD/h
Northern Virgina (US) / us-east-1
1.07644 USD/h 3.6288 USD/h
Ohio (US) / us-east-2
1.2621 USD/h 3.6288 USD/h
Oregon (US) / us-west-2
1.747375 USD/h 3.6288 USD/h
Quebec (CA) / ca-central-1
1.7627 USD/h 3.9744 USD/h
California (US) / us-west-1
1.33745 USD/h 4.032 USD/h
Dublin (IE) / eu-west-1
1.728267 USD/h 4.0608 USD/h
London (GB) / eu-west-2
0.888433 USD/h 4.2624 USD/h
Sydney (AU) / ap-southeast-2
1.961033 USD/h 4.3488 USD/h
Tokyo (JP) / ap-northeast-1
1.9457 USD/h 4.3776 USD/h
Singapore (SG) / ap-southeast-1
1.97055 USD/h 4.3776 USD/h
Frankfurt (DE) / eu-central-1
2.312 USD/h 4.3776 USD/h

Processor

vCPUs
64
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
32
CPU Speed
3.6 GHz
CPU Architecture
x86_64
CPU Manufacturer
AMD
CPU Family
EPYC
CPU Model
7R13
CPU L1D Cache
32 KiB
CPU L1D Cache Total
1 MiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
1 MiB
CPU L2 Cache
512 KiB
CPU L2 Cache Total
16 MiB
CPU L3 Cache
32 MiB
CPU L3 Cache Total
128 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, pcid, sse4_1, sse4_2, x2apic, movbe, popcnt, aes, xsave, avx, f16c, rdrand, hypervisor, lahf_lm, cmp_legacy, cr8_legacy, abm, sse4a, misalignsse, 3dnowprefetch, topoext, ssbd, ibrs, ibpb, stibp, vmmcall, fsgsbase, bmi1, avx2, smep, bmi2, invpcid, rdseed, adx, smap, clflushopt, clwb, sha_ni, xsaveopt, xsavec, xgetbv1, clzero, xsaveerptr, rdpru, wbnoinvd, arat, npt, nrip_save, vaes, vpclmulqdq, rdpid
Ecpus
32
Scalability
100

System Resources and Accelerators

MEMORY
Memory Amount
512 GiB
Memory Amount Actual
512 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
      25 Gbps
      Network Speed Max
      25 Gbps
      Network Storage Speed Baseline
      20 Gbps
      Network Storage Speed Max
      20 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      Server Description

      A memory-optimized x86 server featuring high RAM density and strong multi-core performance for database and caching workloads.

      Memory OptimizedGeneral Purpose

      Amazon Web Services r6a.16xlarge is a memory-optimized server instance featuring 64 vCPUs and 32 physical cores powered by an AMD EPYC 7R13 processor running at 3.6 GHz. Built on the AWS Nitro hypervisor, it delivers 512.0 GB of DDR4 memory, establishing an 8 GB per core ratio. The instance lacks local storage and dedicated GPUs, but provides a 25 Gbps baseline network bandwidth. Performance benchmarks indicate strong capabilities in multi-core CPU execution, database operations, and Redis SET operations, which exceed 68.81 million operations per second. Conversely, uncached large-block memory bandwidth and medium-model LLM inference speeds remain average. This hardware profile is engineered for memory-heavy workloads, including in-memory databases, caching layers, and enterprise data processing applications.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      2.32Score
      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) 5,634,923 ops/sec 1,896,415 ops/sec 2.97 50.00% 50.00% +72.30%
      Redis RPS (pipeline=16, SET) 40,031,913 ops/sec 11,539,523 ops/sec 3.47 20.00% 20.00% +28.30%
      PassMark Memory Mark (composite) 2,895 2,411 1.2 10.00% 10.00% +1.84%
      Memory bandwidth (read, 16 MB ~ L3) 131,545 MB/sec 107,368 MB/sec 1.23 10.00% 10.00% +2.09%
      PassMark single-thread CPU 2,643 Mops/s 2,363 Mops/s 1.12 10.00% 10.00% +1.14%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 1,677

      Geekbench Multi-Core

      Score: 16,129

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 67025
      Compression
      		 1100275
      Encryption
      		 75937
      Extended Instructions
      		 58366
      Floating Point Maths
      		 161607
      Integer Maths
      		 294338
      Physics
      		 6641
      Prime Numbers
      		 370
      Single Threaded
      		 2643
      String Sorting
      		 144092

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2895
      Database Operations
      		 26851
      Memory Latency
      		 63
      Memory Read Cached
      		 26499
      Memory Read Uncached
      		 17359
      Memory Write
      		 16976

      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
      r6a.large 216 GiB0
      r6a.xlarge 432 GiB0
      r6a.2xlarge 864 GiB0
      r6a.4xlarge 16128 GiB0
      r6a.8xlarge 32256 GiB0
      r6a.12xlarge 48384 GiB0
      r6a.24xlarge 96768 GiB0

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      r6a.16xlarge FAQs