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 0.1749 USD per hour.
16 vCPU
128 GiB Memory
600 GB Storage
Spare SCore
4,724
(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
2026-11-05T08:02:26.635609

Availability

REGION / IDSPOTONDEMAND
Mumbai (IN) / ap-south-1
0.334633 USD/h 0.664 USD/h
Ohio (US) / us-east-2
0.391167 USD/h 1.048 USD/h
Northern Virgina (US) / us-east-1
0.39494 USD/h 1.048 USD/h
Oregon (US) / us-west-2
0.4692 USD/h 1.048 USD/h
Quebec (CA) / ca-central-1
0.3803 USD/h 1.152 USD/h
Dublin (IE) / eu-west-1
0.5493 USD/h 1.168 USD/h
California (US) / us-west-1
0.4464 USD/h 1.184 USD/h
Paris (FR) / eu-west-3
0.461633 USD/h 1.224 USD/h
London (GB) / eu-west-2
0.444033 USD/h 1.232 USD/h
Seoul (KR) / ap-northeast-2
0.4561 USD/h 1.264 USD/h
Frankfurt (DE) / eu-central-1
0.5122 USD/h 1.264 USD/h
Tokyo (JP) / ap-northeast-1
0.4813 USD/h 1.272 USD/h
Sydney (AU) / ap-southeast-2
0.534733 USD/h 1.272 USD/h
Singapore (SG) / ap-southeast-1
0.640633 USD/h 1.272 USD/h
Sao Paulo (BR) / sa-east-1
0.1763 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
50

System Resources and Accelerators

MEMORY
Memory Amount
128 GiB
Memory Amount Actual
128 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
    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

    0.47Score
    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 1,938,397 ops/sec 0.45 50.00% 50.00% -33.00%
    Redis RPS (pipeline=16, SET) 5,596,468 ops/sec 11,810,473 ops/sec 0.47 20.00% 20.00% -14.00%
    PassMark Memory Mark (composite) 2,007 2,410 0.83 10.00% 10.00% -1.80%
    Memory bandwidth (read, 16 MB ~ L3) 28,434 MB/sec 108,490 MB/sec 0.25 10.00% 10.00% -13.00%
    PassMark single-thread CPU 1,444 Mops/s 2,365 Mops/s 0.58 10.00% 10.00% -5.30%

    Memory Bandwidth

    Compression

    OpenSSL

    Geekbench Single-Core

    Score: 726

    Geekbench Multi-Core

    Score: 4,582

    Passmark CPU Scores

    BENCHMARKSCORE
    Mark
    		 12,505
    Compression
    		 176,037
    Encryption
    		 12,971
    Extended Instructions
    		 6,556
    Floating Point Maths
    		 21,852
    Integer Maths
    		 41,446
    Physics
    		 866
    Prime Numbers
    		 37
    Single Threaded
    		 1,444
    String Sorting
    		 23,451

    Passmark Memory Scores

    BENCHMARKSCORE
    Memory Mark
    		 2,007
    Database Operations
    		 3,727
    Memory Latency
    		 62
    Memory Read Cached
    		 14,936
    Memory Read Uncached
    		 11,549
    Memory Write
    		 8,314

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

    Similar Servers

    INSTANCEVENDORvCPUsMEMORYAccelerators

    r5ad.4xlarge FAQs