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r5n.12xlarge by Amazon Web Services

r5n.12xlarge is a Memory optimized [Network and EBS optimized] Gen5 12xlarge server offered by Amazon Web Services with 48 vCPUs, 384 GiB of memory and 0 GB of storage. The pricing starts at 0.42 USD per hour.
48 vCPU
384 GiB Memory
Spare SCore
40675
(All-cores)
1382
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
r5n.12xlarge
Description
Memory optimized [Network and EBS optimized] Gen5 12xlarge
Family
r5n
Hw Virt
Status
active
Observed At
2026-07-31T04:53:00.372114

Availability

REGION / IDSPOTONDEMAND
Ohio (US) / us-east-2
1.2491 USD/h 3.576 USD/h
Northern Virgina (US) / us-east-1
1.6334 USD/h 3.576 USD/h
Oregon (US) / us-west-2
1.9967 USD/h 3.576 USD/h
Mumbai (IN) / ap-south-1
0.961567 USD/h 3.672 USD/h
Stockholm (SE) / eu-north-1
0.979967 USD/h 3.816 USD/h
Quebec (CA) / ca-central-1
1.352667 USD/h 3.912 USD/h
Dublin (IE) / eu-west-1
1.724933 USD/h 4.008 USD/h
California (US) / us-west-1
1.30175 USD/h 4.056 USD/h
Milan (IT) / eu-south-1
0.700267 USD/h 4.2 USD/h
Paris (FR) / eu-west-3
1.203367 USD/h 4.2 USD/h
London (GB) / eu-west-2
1.5129 USD/h 4.2 USD/h
Seoul (KR) / ap-northeast-2
1.78195 USD/h 4.272 USD/h
Singapore (SG) / ap-southeast-1
1.752233 USD/h 4.272 USD/h
Frankfurt (DE) / eu-central-1
1.8557 USD/h 4.272 USD/h
Tokyo (JP) / ap-northeast-1
1.250933 USD/h 4.344 USD/h
Sydney (AU) / ap-southeast-2
1.561967 USD/h 4.344 USD/h
Cape Town (ZA) / af-south-1
0.728433 USD/h 4.768 USD/h
Hong Kong (HK) / ap-east-1
1.033133 USD/h 4.848 USD/h
Sao Paulo (BR) / sa-east-1
2.6019 USD/h 5.664 USD/h

Processor

vCPUs
48
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
24
CPU Speed
3.1 GHz
CPU Architecture
x86_64
CPU Manufacturer
Intel
CPU Family
Xeon
CPU Model
8259CL
CPU L1D Cache
32 KiB
CPU L1D Cache Total
768 KiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
768 KiB
CPU L2 Cache
1 MiB
CPU L2 Cache Total
24 MiB
CPU L3 Cache
36 MiB
CPU L3 Cache Total
36 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, ss, ht, syscall, nx, pdpe1gb, rdtscp, lm, constant_tsc, arch_perfmon, rep_good, nopl, xtopology, nonstop_tsc, cpuid, aperfmperf, tsc_known_freq, pni, pclmulqdq, monitor, ssse3, fma, cx16, pcid, sse4_1, sse4_2, x2apic, movbe, popcnt, tsc_deadline_timer, aes, xsave, avx, f16c, rdrand, hypervisor, lahf_lm, abm, 3dnowprefetch, pti, fsgsbase, tsc_adjust, bmi1, avx2, smep, bmi2, erms, invpcid, mpx, avx512f, avx512dq, rdseed, adx, smap, clflushopt, clwb, avx512cd, avx512bw, avx512vl, xsaveopt, xsavec, xgetbv1, xsaves, ida, arat, pku, ospke, avx512_vnni
Ecpus
29.4
Scalability
122.5

System Resources and Accelerators

MEMORY
Memory Amount
384 GiB
Memory Amount Actual
384 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
      50 Gbps
      Network Speed Max
      50 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 instance featuring 384 GB of DDR4 RAM and 50 Gbps network bandwidth for memory-intensive workloads.

      Memory Optimized

      Amazon Web Services r5n.12xlarge is a memory-optimized instance featuring 48 vCPUs and 24 physical cores powered by an Intel Xeon 8259CL processor running at 3.1 GHz. Built on the Nitro hypervisor, it provides 384.0 GB of DDR4 RAM, resulting in an 8.0 GB per core memory allocation. The instance does not include local storage or GPU hardware, but offers a 50 Gbps baseline network bandwidth. Performance benchmarks reveal a contrast between weak single-core execution and average multi-core capabilities, with memory bandwidth and database operations performing in the middle 50% tier. This hardware profile is designed for memory-intensive workloads, database management, and caching systems such as Redis, where high memory capacity and network throughput are prioritized over raw single-threaded compute performance.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      1.67Score
      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) 3,983,767 ops/sec 1,896,415 ops/sec 2.1 50.00% 50.00% +44.90%
      Redis RPS (pipeline=16, SET) 23,252,986 ops/sec 11,539,523 ops/sec 2.02 20.00% 20.00% +15.10%
      PassMark Memory Mark (composite) 2,732 2,411 1.13 10.00% 10.00% +1.23%
      Memory bandwidth (read, 16 MB ~ L3) 115,350 MB/sec 107,368 MB/sec 1.07 10.00% 10.00% +0.68%
      PassMark single-thread CPU 1,950 Mops/s 2,363 Mops/s 0.825 10.00% 10.00% -1.91%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 1,252

      Geekbench Multi-Core

      Score: 11,039

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 34693
      Compression
      		 594119
      Encryption
      		 18577
      Extended Instructions
      		 37003
      Floating Point Maths
      		 72984
      Integer Maths
      		 136290
      Physics
      		 2546
      Prime Numbers
      		 175
      Single Threaded
      		 1950
      String Sorting
      		 68330

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2732
      Database Operations
      		 15658
      Memory Latency
      		 53
      Memory Read Cached
      		 23832
      Memory Read Uncached
      		 11545
      Memory Write
      		 10818

      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
      r5n.large 216 GiB0
      r5n.xlarge 432 GiB0
      r5n.2xlarge 864 GiB0
      r5n.4xlarge 16128 GiB0
      r5n.8xlarge 32256 GiB0
      r5n.16xlarge 64512 GiB0
      r5n.24xlarge 96768 GiB0

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      r5n.12xlarge FAQs