r5ad.12xlarge by Amazon Web Services

r5ad.12xlarge is a Memory optimized [AMD processors] [Instance store volumes] Gen5 12xlarge server offered by Amazon Web Services with 48 vCPUs, 384 GiB of memory and 1.8 TB of storage. The pricing starts at 0.4992 USD per hour.
48 vCPU
384 GiB Memory
1.8 TB Storage
Spare SCore
14,166
(All-cores)
591
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
r5ad.12xlarge
Description
Memory optimized [AMD processors] [Instance store volumes] Gen5 12xlarge
Family
r5ad
Hw Virt
Status
active
Observed At
2026-10-28T19:56:30.298108

Availability

REGION / IDSPOTONDEMAND
Mumbai (IN) / ap-south-1
0.879667 USD/h 1.993 USD/h
Ohio (US) / us-east-2
0.9222 USD/h 3.144 USD/h
Northern Virgina (US) / us-east-1
1.41274 USD/h 3.144 USD/h
Oregon (US) / us-west-2
1.577475 USD/h 3.144 USD/h
Quebec (CA) / ca-central-1
1.1286 USD/h 3.456 USD/h
Dublin (IE) / eu-west-1
1.333233 USD/h 3.504 USD/h
California (US) / us-west-1
0.85585 USD/h 3.552 USD/h
Paris (FR) / eu-west-3
1.137267 USD/h 3.672 USD/h
London (GB) / eu-west-2
1.246833 USD/h 3.696 USD/h
Seoul (KR) / ap-northeast-2
1.05725 USD/h 3.792 USD/h
Frankfurt (DE) / eu-central-1
1.420933 USD/h 3.792 USD/h
Tokyo (JP) / ap-northeast-1
1.0276 USD/h 3.816 USD/h
Singapore (SG) / ap-southeast-1
1.548 USD/h 3.816 USD/h
Sydney (AU) / ap-southeast-2
1.6877 USD/h 3.816 USD/h
Sao Paulo (BR) / sa-east-1
0.51265 USD/h 4.992 USD/h

Processor

vCPUs
48
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
24
CPU Speed
2.2 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
Scalability
50

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
    1800 GB
    Storage Type
    nvme ssd
    Storages
    • 900 GB nvme ssd
    • 900 GB nvme ssd
    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 combining high-capacity DDR4 memory with local NVMe SSD storage for data-intensive and cryptographic workloads.

    Memory OptimizedStorage & Database

    Amazon Web Services r5ad.12xlarge is a memory-optimized instance featuring 48 vCPUs and 24 physical cores powered by an AMD EPYC 7571 processor running at 2.2 GHz. It is configured with 384.0 GB of DDR4 memory and 1800 GB of local NVMe SSD storage, operating on the Nitro hypervisor with a 10 Gbps baseline network speed. Performance benchmarks indicate weak single-core CPU capabilities, placing in the bottom 10%, but average multi-core and memory bandwidth performance. Cryptographic execution is a relative strength, scoring in the top 25% due to hardware-accelerated instructions. This instance offers qualitative cost efficiency for memory-heavy and local-storage-dependent workloads, making it suitable for database deployments, in-memory caching, and multi-threaded data processing rather than compute-bound or single-threaded applications.

    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) 2,506,285 ops/sec 1,919,289 ops/sec 1.3 50.00% 50.00% +14.00%
    Redis RPS (pipeline=16, SET) 16,603,843 ops/sec 11,728,058 ops/sec 1.4 20.00% 20.00% +7.00%
    PassMark Memory Mark (composite) 2,181 2,416 0.92 10.00% 10.00% -0.83%
    Memory bandwidth (read, 16 MB ~ L3) 84,099 MB/sec 108,466 MB/sec 0.76 10.00% 10.00% -2.70%
    PassMark single-thread CPU 1,447 Mops/s 2,365 Mops/s 0.58 10.00% 10.00% -5.30%

    Memory Bandwidth

    Compression

    OpenSSL

    Geekbench Single-Core

    Score: 727

    Geekbench Multi-Core

    Score: 6,913

    Passmark CPU Scores

    BENCHMARKSCORE
    Mark
    		 30,317
    Compression
    		 531,396
    Encryption
    		 38,785
    Extended Instructions
    		 19,762
    Floating Point Maths
    		 65,493
    Integer Maths
    		 124,289
    Physics
    		 2,577
    Prime Numbers
    		 110
    Single Threaded
    		 1,447
    String Sorting
    		 70,019

    Passmark Memory Scores

    BENCHMARKSCORE
    Memory Mark
    		 2,181
    Database Operations
    		 11,314
    Memory Latency
    		 62
    Memory Read Cached
    		 14,930
    Memory Read Uncached
    		 11,424
    Memory Write
    		 8,320

    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
    r5ad.large 216 GiB0
    r5ad.xlarge 432 GiB0
    r5ad.2xlarge 864 GiB0
    r5ad.4xlarge 16128 GiB0
    r5ad.8xlarge 32256 GiB0
    r5ad.16xlarge 64512 GiB0
    r5ad.24xlarge 96768 GiB0

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    r5ad.12xlarge FAQs