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r5ad.4xlarge by Amazon Web Services

r5ad.4xlarge is a Memory optimized [AMD processors] [Instance store volumes] Gen5 4xlarge server offered by Amazon Web Services with 16 vCPUs, 128 GiB of memory and 600 GB of storage. The pricing starts at 0.2366 USD per hour.
16 vCPU
128 GiB Memory
600 GB Storage
Spare SCore
4724
(All-cores)
591
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
r5ad.4xlarge
Description
Memory optimized [AMD processors] [Instance store volumes] Gen5 4xlarge
Family
r5ad
Hw Virt
Status
active
Observed At
2026-08-07T04:33:36.796146

Availability

REGION / IDSPOTONDEMAND
Mumbai (IN) / ap-south-1
0.265033 USD/h 0.664 USD/h
Northern Virgina (US) / us-east-1
0.53458 USD/h 1.048 USD/h
Ohio (US) / us-east-2
0.4269 USD/h 1.048 USD/h
Oregon (US) / us-west-2
0.500625 USD/h 1.048 USD/h
Quebec (CA) / ca-central-1
0.42145 USD/h 1.152 USD/h
Dublin (IE) / eu-west-1
0.6153 USD/h 1.168 USD/h
California (US) / us-west-1
0.53755 USD/h 1.184 USD/h
Paris (FR) / eu-west-3
0.512633 USD/h 1.224 USD/h
London (GB) / eu-west-2
0.550267 USD/h 1.232 USD/h
Seoul (KR) / ap-northeast-2
0.46075 USD/h 1.264 USD/h
Frankfurt (DE) / eu-central-1
0.5987 USD/h 1.264 USD/h
Tokyo (JP) / ap-northeast-1
0.43135 USD/h 1.272 USD/h
Sydney (AU) / ap-southeast-2
0.563 USD/h 1.272 USD/h
Singapore (SG) / ap-southeast-1
0.680233 USD/h 1.272 USD/h
Sao Paulo (BR) / sa-east-1
0.40325 USD/h 1.664 USD/h

Processor

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

System Resources and Accelerators

MEMORY
Memory Amount
128 GiB
Memory Amount Actual
128 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
    600 GB
    Storage Type
    nvme ssd
    Storages
    • 300 GB nvme ssd
    • 300 GB nvme ssd
    NETWORK
    Network Speed Baseline
    5 Gbps
    Network Speed Max
    10 Gbps
    Network Storage Speed Baseline
    2.88 Gbps
    Network Storage Speed Max
    2.88 Gbps
    Inbound Traffic
    0 GB/month
    Outbound Traffic
    0 GB/month
    IPv4
    0

    Server Description

    A memory-optimized instance featuring dedicated AMD EPYC processors, high-capacity DDR4 memory, and fast local NVMe SSD storage for database workloads.

    Memory OptimizedStorage & Database

    Amazon Web Services r5ad.4xlarge is a memory-optimized instance utilizing the Nitro hypervisor and an AMD EPYC 7571 processor. It features 16 vCPUs, 8 physical cores, and 128.0 GB of DDR4 memory, establishing an 8:1 memory-to-vCPU ratio. The instance includes 600 GB of local NVMe SSD storage and a baseline network bandwidth of 5 Gbps. Performance benchmarks indicate average multi-core capabilities, with a Passmark CPU score of 12505.34 and a Geekbench multi-core score of 4582.0, though single-core performance is relatively weak. Memory bandwidth is average for cached small blocks but drops for uncached large blocks. This configuration is qualitatively cost-efficient for memory-intensive workloads that benefit from local NVMe storage, such as database operations, caching layers, and medium-scale data processing, rather than compute-heavy or single-threaded applications.

    Economics

    Average Price per Region

    Prices per Zone

    Lowest Prices

    Performance

    Workload Profiles

    0.473Score
    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) 854,270 ops/sec 1,910,660 ops/sec 0.447 50.00% 50.00% -33.10%
    Redis RPS (pipeline=16, SET) 5,596,468 ops/sec 11,608,287 ops/sec 0.482 20.00% 20.00% -13.60%
    PassMark Memory Mark (composite) 2,007 2,416 0.831 10.00% 10.00% -1.83%
    Memory bandwidth (read, 16 MB ~ L3) 28,434 MB/sec 107,896 MB/sec 0.264 10.00% 10.00% -12.50%
    PassMark single-thread CPU 1,444 Mops/s 2,364 Mops/s 0.611 10.00% 10.00% -4.81%

    Memory Bandwidth

    Compression

    OpenSSL

    Geekbench Single-Core

    Score: 726

    Geekbench Multi-Core

    Score: 4,582

    Passmark CPU Scores

    BENCHMARKSCORE
    Mark
    		 12505
    Compression
    		 176037
    Encryption
    		 12971
    Extended Instructions
    		 6556
    Floating Point Maths
    		 21852
    Integer Maths
    		 41446
    Physics
    		 866
    Prime Numbers
    		 37
    Single Threaded
    		 1444
    String Sorting
    		 23451

    Passmark Memory Scores

    BENCHMARKSCORE
    Memory Mark
    		 2007
    Database Operations
    		 3727
    Memory Latency
    		 62
    Memory Read Cached
    		 14936
    Memory Read Uncached
    		 11549
    Memory Write
    		 8314

    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.8xlarge 32256 GiB0
    r5ad.12xlarge 48384 GiB0
    r5ad.16xlarge 64512 GiB0
    r5ad.24xlarge 96768 GiB0

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    r5ad.4xlarge FAQs