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r5ad.16xlarge by Amazon Web Services

r5ad.16xlarge is a Memory optimized [AMD processors] [Instance store volumes] Gen5 16xlarge server offered by Amazon Web Services with 64 vCPUs, 512 GiB of memory and 2.4 TB of storage. The pricing starts at 0.6466 USD per hour.
64 vCPU
512 GiB Memory
2.4 TB Storage
Spare SCore
18862
(All-cores)
590
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
r5ad.16xlarge
Description
Memory optimized [AMD processors] [Instance store volumes] Gen5 16xlarge
Family
r5ad
Hw Virt
Status
active
Observed At
2026-08-04T18:48:40.103582

Availability

REGION / IDSPOTONDEMAND
Mumbai (IN) / ap-south-1
0.939 USD/h 2.658 USD/h
Ohio (US) / us-east-2
1.352267 USD/h 4.192 USD/h
Northern Virgina (US) / us-east-1
1.55008 USD/h 4.192 USD/h
Oregon (US) / us-west-2
2.1517 USD/h 4.192 USD/h
Quebec (CA) / ca-central-1
2.00195 USD/h 4.608 USD/h
Dublin (IE) / eu-west-1
2.051267 USD/h 4.672 USD/h
California (US) / us-west-1
1.32095 USD/h 4.736 USD/h
Paris (FR) / eu-west-3
1.075867 USD/h 4.896 USD/h
London (GB) / eu-west-2
1.8511 USD/h 4.928 USD/h
Seoul (KR) / ap-northeast-2
1.5679 USD/h 5.056 USD/h
Frankfurt (DE) / eu-central-1
1.7723 USD/h 5.056 USD/h
Tokyo (JP) / ap-northeast-1
1.1385 USD/h 5.088 USD/h
Sydney (AU) / ap-southeast-2
1.9694 USD/h 5.088 USD/h
Singapore (SG) / ap-southeast-1
2.180033 USD/h 5.088 USD/h
Sao Paulo (BR) / sa-east-1
1.15755 USD/h 6.656 USD/h

Processor

vCPUs
64
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
32
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
1 MiB
CPU L1I Cache
64 KiB
CPU L1I Cache Total
2 MiB
CPU L2 Cache
512 KiB
CPU L2 Cache Total
16 MiB
CPU L3 Cache
8 MiB
CPU L3 Cache Total
64 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
31.9
Scalability
99.69

System Resources and Accelerators

MEMORY
Memory Amount
512 GiB
Memory Amount Actual
512 GiB
Memory Generation
DDR4
Memory Speed
2667 Mhz
GPU
GPU Count
0
GPU Memory Min
0 MiB
GPU Memory Total
0 MiB
GPUs
    STORAGE
    Storage Size
    2400 GB
    Storage Type
    nvme ssd
    Storages
    • 600 GB nvme ssd
    • 600 GB nvme ssd
    • 600 GB nvme ssd
    • 600 GB nvme ssd
    NETWORK
    Network Speed Baseline
    12 Gbps
    Network Speed Max
    12 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 combining a dense DDR4 memory footprint with high-capacity local NVMe SSD storage for data-intensive workloads.

    Memory OptimizedStorage & Database

    Amazon Web Services r5ad.16xlarge is a memory-optimized instance utilizing the Nitro hypervisor and an x86_64 architecture. It is configured with 64 vCPUs, 32 physical AMD EPYC 7571 cores running at 2.5 GHz, and 512.0 GB of DDR4 memory. The instance features 2400 GB of local NVMe SSD storage and a baseline network bandwidth of 12 Gbps. Performance benchmarks indicate a distinct tradeoff: single-core CPU metrics and single-threaded decompression are in the bottom 10%, whereas multi-core performance, memory bandwidth, and Redis operations rank in the average middle 50% tier. Cryptographic processing is a relative strength, scoring in the top 25%. This hardware profile is suited for memory-intensive databases and multi-threaded workloads that benefit from local NVMe instance storage, though it is less efficient for single-threaded tasks or heavy LLM text generation.

    Economics

    Average Price per Region

    Prices per Zone

    Lowest Prices

    Performance

    Workload Profiles

    1.4Score
    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) 3,231,311 ops/sec 1,910,660 ops/sec 1.69 50.00% 50.00% +30.00%
    Redis RPS (pipeline=16, SET) 21,940,177 ops/sec 11,608,287 ops/sec 1.89 20.00% 20.00% +13.60%
    PassMark Memory Mark (composite) 2,187 2,416 0.905 10.00% 10.00% -0.99%
    Memory bandwidth (read, 16 MB ~ L3) 110,758 MB/sec 107,896 MB/sec 1.03 10.00% 10.00% +0.30%
    PassMark single-thread CPU 1,446 Mops/s 2,364 Mops/s 0.612 10.00% 10.00% -4.79%

    Memory Bandwidth

    Compression

    OpenSSL

    Geekbench Single-Core

    Score: 722

    Geekbench Multi-Core

    Score: 7,495

    Passmark CPU Scores

    BENCHMARKSCORE
    Mark
    		 36866
    Compression
    		 706271
    Encryption
    		 51744
    Extended Instructions
    		 26041
    Floating Point Maths
    		 87400
    Integer Maths
    		 165915
    Physics
    		 3433
    Prime Numbers
    		 147
    Single Threaded
    		 1446
    String Sorting
    		 94869

    Passmark Memory Scores

    BENCHMARKSCORE
    Memory Mark
    		 2187
    Database Operations
    		 14940
    Memory Latency
    		 63
    Memory Read Cached
    		 14940
    Memory Read Uncached
    		 11501
    Memory Write
    		 8140

    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
    r5ad.large 216 GiB0
    r5ad.xlarge 432 GiB0
    r5ad.2xlarge 864 GiB0
    r5ad.4xlarge 16128 GiB0
    r5ad.8xlarge 32256 GiB0
    r5ad.12xlarge 48384 GiB0
    r5ad.24xlarge 96768 GiB0

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    r5ad.16xlarge FAQs