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r6a.4xlarge by Amazon Web Services

r6a.4xlarge is a Memory optimized [AMD processors] Gen6 4xlarge server offered by Amazon Web Services with 16 vCPUs, 128 GiB of memory and 0 GB of storage. The pricing starts at 0.1554 USD per hour.
16 vCPU
128 GiB Memory
Spare SCore
23940
(All-cores)
2993
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
r6a.4xlarge
Description
Memory optimized [AMD processors] Gen6 4xlarge
Family
r6a
Hw Virt
Status
active
Observed At
2026-07-27T14:53:25.515382

Availability

REGION / IDSPOTONDEMAND
Hyderabad (IN) / ap-south-2
0.193333 USD/h 0.572 USD/h
Mumbai (IN) / ap-south-1
0.2155 USD/h 0.572 USD/h
Ohio (US) / us-east-2
0.3408 USD/h 0.9072 USD/h
Northern Virgina (US) / us-east-1
0.37646 USD/h 0.9072 USD/h
Oregon (US) / us-west-2
0.402375 USD/h 0.9072 USD/h
Quebec (CA) / ca-central-1
0.39065 USD/h 0.9936 USD/h
California (US) / us-west-1
0.4034 USD/h 1.008 USD/h
Dublin (IE) / eu-west-1
0.5317 USD/h 1.0152 USD/h
London (GB) / eu-west-2
0.392867 USD/h 1.0656 USD/h
Sydney (AU) / ap-southeast-2
0.484933 USD/h 1.0872 USD/h
Tokyo (JP) / ap-northeast-1
0.4036 USD/h 1.0944 USD/h
Singapore (SG) / ap-southeast-1
0.5521 USD/h 1.0944 USD/h
Frankfurt (DE) / eu-central-1
0.51 USD/h 1.0944 USD/h

Processor

vCPUs
16
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
8
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
256 KiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
256 KiB
CPU L2 Cache
512 KiB
CPU L2 Cache Total
4 MiB
CPU L3 Cache
32 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, 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
8
Scalability
100

System Resources and Accelerators

MEMORY
Memory Amount
128 GiB
Memory Amount Actual
128 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
      6.25 Gbps
      Network Speed Max
      12.5 Gbps
      Network Storage Speed Baseline
      5 Gbps
      Network Storage Speed Max
      10 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      Server Description

      A memory-optimized x86_64 instance featuring high memory density and strong single-core performance for database and caching workloads.

      Memory Optimized

      Amazon Web Services r6a.4xlarge is a memory-optimized server instance utilizing the Nitro hypervisor and an x86_64 AMD EPYC 7R13 processor operating at 3.6 GHz. It features 16 dedicated vCPUs, 8 physical cores, and 128.0 GB of DDR4 memory, with no local storage or GPU resources. Network baseline bandwidth is 6 Gbps. Performance benchmarks show strong single-core CPU capabilities, while multi-core compute, database operations, and software compilation fall into the average tier. A key tradeoff is uncached memory bandwidth for large blocks, which ranks in the bottom 25%. This instance is suited for memory-intensive workloads such as database hosting, caching layers, and static web serving where a high memory-to-vCPU ratio is required without demanding extreme uncached memory throughput.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      0.776Score
      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) 1,409,991 ops/sec 1,896,415 ops/sec 0.744 50.00% 50.00% -13.70%
      Redis RPS (pipeline=16, SET) 9,979,787 ops/sec 11,539,523 ops/sec 0.865 20.00% 20.00% -2.86%
      PassMark Memory Mark (composite) 2,681 2,411 1.11 10.00% 10.00% +1.05%
      Memory bandwidth (read, 16 MB ~ L3) 40,198 MB/sec 107,368 MB/sec 0.374 10.00% 10.00% -9.37%
      PassMark single-thread CPU 2,644 Mops/s 2,363 Mops/s 1.12 10.00% 10.00% +1.14%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 1,675

      Geekbench Multi-Core

      Score: 9,665

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 23588
      Compression
      		 285475
      Encryption
      		 18945
      Extended Instructions
      		 16512
      Floating Point Maths
      		 40376
      Integer Maths
      		 73616
      Physics
      		 1995
      Prime Numbers
      		 101
      Single Threaded
      		 2644
      String Sorting
      		 37292

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2681
      Database Operations
      		 7267
      Memory Latency
      		 63
      Memory Read Cached
      		 26363
      Memory Read Uncached
      		 17661
      Memory Write
      		 17159

      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.8xlarge 32256 GiB0
      r6a.12xlarge 48384 GiB0
      r6a.16xlarge 64512 GiB0
      r6a.24xlarge 96768 GiB0

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      r6a.4xlarge FAQs