c5ad.16xlarge by Amazon Web Services

c5ad.16xlarge is a Compute optimized [AMD processors] [Instance store volumes] Gen5 16xlarge server offered by Amazon Web Services with 64 vCPUs, 128 GiB of memory and 2.4 TB of storage. The pricing starts at 0.5717 USD per hour.
64 vCPU
128 GiB Memory
2.4 TB Storage
Spare SCore
24,585
(All-cores)
767
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
c5ad.16xlarge
Description
Compute optimized [AMD processors] [Instance store volumes] Gen5 16xlarge
Family
c5ad
Hw Virt
Status
active
Observed At
2026-11-04T00:05:29.012983

Availability

REGION / IDSPOTONDEMAND
Northern Virgina (US) / us-east-1
0.95814 USD/h 2.752 USD/h
Ohio (US) / us-east-2
1.13555 USD/h 2.752 USD/h
Oregon (US) / us-west-2
1.1926 USD/h 2.752 USD/h
Dublin (IE) / eu-west-1
1.604333 USD/h 3.136 USD/h
Frankfurt (DE) / eu-central-1
1.413033 USD/h 3.2 USD/h
Singapore (SG) / ap-southeast-1
1.33105 USD/h 3.232 USD/h
Milan (IT) / eu-south-1
0.7633 USD/h 3.296 USD/h
Sydney (AU) / ap-southeast-2
1.316467 USD/h 3.616 USD/h
Cape Town (ZA) / af-south-1
0.990167 USD/h 3.744 USD/h
Sao Paulo (BR) / sa-east-1
0.6237 USD/h 4.288 USD/h

Processor

vCPUs
64
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
32
CPU Speed
3.3 GHz
CPU Architecture
x86_64
CPU Manufacturer
AMD
CPU Family
EPYC
CPU Model
7R32
CPU L1D Cache
32 KiB
CPU L1D Cache Total
1 MiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
1 MiB
CPU L2 Cache
512 KiB
CPU L2 Cache Total
16 MiB
CPU L3 Cache
16 MiB
CPU L3 Cache Total
128 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, ssbd, ibrs, ibpb, stibp, vmmcall, fsgsbase, bmi1, avx2, smep, bmi2, rdseed, adx, smap, clflushopt, clwb, sha_ni, xsaveopt, xsavec, xgetbv1, clzero, xsaveerptr, rdpru, wbnoinvd, arat, npt, nrip_save, rdpid
Ecpus
32
Scalability
50

System Resources and Accelerators

MEMORY
Memory Amount
128 GiB
Memory Amount Actual
128 GiB
Memory Generation
DDR4
Memory Speed
2933 Mhz
ACCELERATORS
Accelerator Count
0
Accelerator Memory Min
0 MiB
Accelerator Memory Total
0 MiB
Accelerators
    STORAGE
    Storage Size
    2400 GB
    Storage Type
    nvme ssd
    Storages
    • 1200 GB nvme ssd
    • 1200 GB nvme ssd
    NETWORK
    Network Speed Baseline
    20 Gbps
    Network Speed Max
    20 Gbps
    Network Storage Speed Baseline
    6.3 Gbps
    Network Storage Speed Max
    6.3 Gbps
    Inbound Traffic
    0 GB/month
    Outbound Traffic
    0 GB/month
    IPv4
    0

    Server Description

    A compute-optimized platform combining sixty-four AMD EPYC vCPUs with high-speed local NVMe SSD storage for demanding multi-threaded workloads.

    Compute OptimizedStorage & Database

    Amazon Web Services c5ad.16xlarge is a compute-optimized instance featuring 64 vCPUs (32 physical cores) powered by an AMD EPYC 7R32 processor running at 3.3 GHz. It is configured with 128.0 GB of DDR4 memory and includes 2400 GB of local NVMe SSD storage, operating on the AWS Nitro hypervisor with a 20 Gbps baseline network speed. Benchmarks show strong performance in Passmark CPU tests, encryption, and ray tracing, though single-core stress-ng performance is relatively weak. The instance provides a qualitative balance of high compute density and fast local storage, making it suitable for multi-threaded batch processing, data analytics, and workloads requiring high-speed temporary scratch space.

    Economics

    Average Price per Region

    Prices per Zone

    Lowest Prices

    Performance

    Workload Profiles

    2Score
    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) 5,057,368 ops/sec 1,930,206 ops/sec 2.7 50.00% 50.00% +64.00%
    Redis RPS (pipeline=16, SET) 33,968,175 ops/sec 11,792,140 ops/sec 2.8 20.00% 20.00% +23.00%
    PassMark Memory Mark (composite) 2,897 2,412 1.2 10.00% 10.00% +1.80%
    Memory bandwidth (read, 16 MB ~ L3) 116,190 MB/sec 108,490 MB/sec 1.1 10.00% 10.00% +0.96%
    PassMark single-thread CPU 2,134 Mops/s 2,365 Mops/s 0.88 10.00% 10.00% -1.30%

    Memory Bandwidth

    Compression

    OpenSSL

    Geekbench Single-Core

    Score: 1,338

    Geekbench Multi-Core

    Score: 14,193

    Passmark CPU Scores

    BENCHMARKSCORE
    Mark
    		 55,685
    Compression
    		 951,202
    Encryption
    		 68,385
    Extended Instructions
    		 57,191
    Floating Point Maths
    		 128,937
    Integer Maths
    		 216,050
    Physics
    		 5,289
    Prime Numbers
    		 302
    Single Threaded
    		 2,134
    String Sorting
    		 127,466

    Passmark Memory Scores

    BENCHMARKSCORE
    Memory Mark
    		 2,897
    Database Operations
    		 21,377
    Memory Latency
    		 51
    Memory Read Cached
    		 24,592
    Memory Read Uncached
    		 12,693
    Memory Write
    		 13,371

    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
    c5ad.large 24 GiB0
    c5ad.xlarge 48 GiB0
    c5ad.2xlarge 816 GiB0
    c5ad.4xlarge 1632 GiB0
    c5ad.8xlarge 3264 GiB0
    c5ad.12xlarge 4896 GiB0
    c5ad.24xlarge 96192 GiB0

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    c5ad.16xlarge FAQs