r5a.12xlarge by Amazon Web Services

r5a.12xlarge is a Memory optimized [AMD processors] Gen5 12xlarge server offered by Amazon Web Services with 48 vCPUs, 384 GiB of memory and 0 GB of storage. The pricing starts at 0.3264 USD per hour.
48 vCPU
384 GiB Memory
Spare SCore
14,157
(All-cores)
582
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
r5a.12xlarge
Description
Memory optimized [AMD processors] Gen5 12xlarge
Family
r5a
Hw Virt
Status
active
Observed At
2026-11-01T13:05:52.409802

Availability

REGION / IDSPOTONDEMAND
Mumbai (IN) / ap-south-1
0.8439 USD/h 1.716 USD/h
Ohio (US) / us-east-2
0.803867 USD/h 2.712 USD/h
Oregon (US) / us-west-2
1.03815 USD/h 2.712 USD/h
Northern Virgina (US) / us-east-1
1.3605 USD/h 2.712 USD/h
Quebec (CA) / ca-central-1
0.97375 USD/h 2.976 USD/h
California (US) / us-west-1
0.8483 USD/h 3.024 USD/h
Dublin (IE) / eu-west-1
1.289 USD/h 3.048 USD/h
Paris (FR) / eu-west-3
0.7405 USD/h 3.192 USD/h
Milan (IT) / eu-south-1
0.6183 USD/h 3.192 USD/h
London (GB) / eu-west-2
0.6765 USD/h 3.192 USD/h
Seoul (KR) / ap-northeast-2
0.33865 USD/h 3.264 USD/h
Singapore (SG) / ap-southeast-1
1.563533 USD/h 3.264 USD/h
Sydney (AU) / ap-southeast-2
1.4752 USD/h 3.264 USD/h
Tokyo (JP) / ap-northeast-1
1.0184 USD/h 3.288 USD/h
Frankfurt (DE) / eu-central-1
1.117067 USD/h 3.288 USD/h
Sao Paulo (BR) / sa-east-1
0.8143 USD/h 4.344 USD/h

Processor

vCPUs
48
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
24
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
768 KiB
CPU L1I Cache
64 KiB
CPU L1I Cache Total
2 MiB
CPU L2 Cache
512 KiB
CPU L2 Cache Total
12 MiB
CPU L3 Cache
8 MiB
CPU L3 Cache Total
48 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
24.3
Scalability
50.62

System Resources and Accelerators

MEMORY
Memory Amount
384 GiB
Memory Amount Actual
384 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
      10 Gbps
      Network Speed Max
      10 Gbps
      Network Storage Speed Baseline
      6.78 Gbps
      Network Storage Speed Max
      6.78 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      Server Description

      A memory-optimized instance featuring 384 GB of DDR4 RAM and 48 vCPUs for memory-intensive multi-core workloads.

      Memory Optimized

      Amazon Web Services r5a.12xlarge is a memory-optimized instance featuring 48 vCPUs and 24 physical cores powered by an AMD EPYC 7571 processor running at 2.5 GHz. Built on the AWS Nitro hypervisor, it provides 384.0 GB of DDR4 memory at 3 GHz, yielding a high memory-to-core ratio of 8.0 GB per core. The instance lacks local storage and dedicated GPUs, relying on a baseline network bandwidth of 10 Gbps. Benchmarks indicate average multi-core CPU performance, average memory bandwidth, and strong encryption capabilities, contrasted by poor single-core performance. This hardware profile is suited for memory-intensive applications, database operations, and caching layers that benefit from large memory capacities rather than high single-threaded compute speeds.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      1.1Score
      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) 2,509,885 ops/sec 1,918,343 ops/sec 1.3 50.00% 50.00% +14.00%
      Redis RPS (pipeline=16, SET) 16,638,537 ops/sec 11,704,734 ops/sec 1.4 20.00% 20.00% +7.00%
      PassMark Memory Mark (composite) 2,159 2,416 0.92 10.00% 10.00% -0.83%
      Memory bandwidth (read, 16 MB ~ L3) 83,294 MB/sec 108,466 MB/sec 0.75 10.00% 10.00% -2.80%
      PassMark single-thread CPU 1,448 Mops/s 2,365 Mops/s 0.58 10.00% 10.00% -5.30%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 724

      Geekbench Multi-Core

      Score: 6,887

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 30,333
      Compression
      		 530,174
      Encryption
      		 38,963
      Extended Instructions
      		 19,782
      Floating Point Maths
      		 65,550
      Integer Maths
      		 124,462
      Physics
      		 2,588
      Prime Numbers
      		 110
      Single Threaded
      		 1,448
      String Sorting
      		 69,773

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2,159
      Database Operations
      		 11,314
      Memory Latency
      		 62
      Memory Read Cached
      		 14,959
      Memory Read Uncached
      		 11,568
      Memory Write
      		 8,245

      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.4xlarge 16128 GiB0
      r5a.8xlarge 32256 GiB0
      r5a.16xlarge 64512 GiB0
      r5a.24xlarge 96768 GiB0

      Similar Servers

      INSTANCEVENDORvCPUsMEMORYAccelerators

      r5a.12xlarge FAQs