c5ad.12xlarge by Amazon Web Services

c5ad.12xlarge is a Compute optimized [AMD processors] [Instance store volumes] Gen5 12xlarge server offered by Amazon Web Services with 48 vCPUs, 96 GiB of memory and 1.8 TB of storage. The pricing starts at 0.4643 USD per hour.
48 vCPU
96 GiB Memory
1.8 TB Storage
Spare SCore
18,430
(All-cores)
766
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
c5ad.12xlarge
Description
Compute optimized [AMD processors] [Instance store volumes] Gen5 12xlarge
Family
c5ad
Hw Virt
Status
active
Observed At
2026-11-03T02:04:15.534967

Availability

REGION / IDSPOTONDEMAND
Northern Virgina (US) / us-east-1
0.91106 USD/h 2.064 USD/h
Oregon (US) / us-west-2
0.803133 USD/h 2.064 USD/h
Ohio (US) / us-east-2
0.85955 USD/h 2.064 USD/h
Dublin (IE) / eu-west-1
1.196433 USD/h 2.352 USD/h
Frankfurt (DE) / eu-central-1
1.011767 USD/h 2.4 USD/h
Singapore (SG) / ap-southeast-1
0.861 USD/h 2.424 USD/h
Milan (IT) / eu-south-1
0.5029 USD/h 2.472 USD/h
Sydney (AU) / ap-southeast-2
0.978067 USD/h 2.712 USD/h
Cape Town (ZA) / af-south-1
0.679633 USD/h 2.808 USD/h
Sao Paulo (BR) / sa-east-1
0.48215 USD/h 3.216 USD/h

Processor

vCPUs
48
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
24
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
768 KiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
768 KiB
CPU L2 Cache
512 KiB
CPU L2 Cache Total
12 MiB
CPU L3 Cache
16 MiB
CPU L3 Cache Total
96 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
24.1
Scalability
50.21

System Resources and Accelerators

MEMORY
Memory Amount
96 GiB
Memory Amount Actual
96 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
    1800 GB
    Storage Type
    nvme ssd
    Storages
    • 900 GB nvme ssd
    • 900 GB nvme ssd
    NETWORK
    Network Speed Baseline
    12 Gbps
    Network Speed Max
    12 Gbps
    Network Storage Speed Baseline
    4.75 Gbps
    Network Storage Speed Max
    4.75 Gbps
    Inbound Traffic
    0 GB/month
    Outbound Traffic
    0 GB/month
    IPv4
    0

    Server Description

    A compute-optimized instance featuring forty-eight vCPUs, fast DDR4 memory, and high-speed local NVMe SSD storage for multi-threaded workloads.

    Compute OptimizedStorage & Database

    The Amazon Web Services c5ad.12xlarge is an x86_64 compute-optimized instance featuring 48 vCPUs powered by an AMD EPYC 7R32 processor running at 3.3 GHz. It is equipped with 96.0 GB of DDR4 memory and 1800 GB of local NVMe SSD storage, operating on the AWS Nitro hypervisor with a baseline network bandwidth of 12 Gbps. Benchmark data reveals a tradeoff, with poor single-core performance but average multi-core execution and strong performance in cryptographic and memory operations, ranking in the top 25% for Passmark encryption and memory tests. Lacking a GPU, this instance is optimized for CPU-bound, multi-threaded workloads. It is highly suited for batch processing, software compilation, database operations, and web serving workloads that require high-speed local scratch storage.

    Economics

    Average Price per Region

    Prices per Zone

    Lowest Prices

    Performance

    Workload Profiles

    1.6Score
    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) 3,837,285 ops/sec 1,919,696 ops/sec 2 50.00% 50.00% +41.00%
    Redis RPS (pipeline=16, SET) 25,761,385 ops/sec 11,736,081 ops/sec 2.2 20.00% 20.00% +17.00%
    PassMark Memory Mark (composite) 2,889 2,415 1.2 10.00% 10.00% +1.80%
    Memory bandwidth (read, 16 MB ~ L3) 100,573 MB/sec 108,466 MB/sec 0.91 10.00% 10.00% -0.94%
    PassMark single-thread CPU 2,111 Mops/s 2,365 Mops/s 0.88 10.00% 10.00% -1.30%

    Memory Bandwidth

    Compression

    OpenSSL

    Geekbench Single-Core

    Score: 1,333

    Geekbench Multi-Core

    Score: 13,095

    Passmark CPU Scores

    BENCHMARKSCORE
    Mark
    		 46,135
    Compression
    		 710,989
    Encryption
    		 51,205
    Extended Instructions
    		 44,661
    Floating Point Maths
    		 96,629
    Integer Maths
    		 161,950
    Physics
    		 4,594
    Prime Numbers
    		 235
    Single Threaded
    		 2,111
    String Sorting
    		 93,676

    Passmark Memory Scores

    BENCHMARKSCORE
    Memory Mark
    		 2,889
    Database Operations
    		 16,391
    Memory Latency
    		 51
    Memory Read Cached
    		 24,529
    Memory Read Uncached
    		 12,930
    Memory Write
    		 13,368

    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.16xlarge 64128 GiB0
    c5ad.24xlarge 96192 GiB0

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    c5ad.12xlarge FAQs