z1d.12xlarge by Amazon Web Services

z1d.12xlarge is a High frequency [Instance store volumes] Gen1 12xlarge server offered by Amazon Web Services with 48 vCPUs, 384 GiB of memory and 1.8 TB of storage. The pricing starts at 0.5064 USD per hour.
48 vCPU
384 GiB Memory
1.8 TB Storage
Spare SCore
52,391
(All-cores)
1,657
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
z1d.12xlarge
Description
High frequency [Instance store volumes] Gen1 12xlarge
Family
z1d
Hw Virt
Status
active
Observed At
2026-10-26T10:39:47.761254

Availability

REGION / IDSPOTONDEMAND
Ohio (US) / us-east-2
1.0891 USD/h 4.464 USD/h
Northern Virgina (US) / us-east-1
1.58758 USD/h 4.464 USD/h
Oregon (US) / us-west-2
1.980833 USD/h 4.464 USD/h
Mumbai (IN) / ap-south-1
0.78775 USD/h 4.704 USD/h
Dublin (IE) / eu-west-1
1.777433 USD/h 4.992 USD/h
California (US) / us-west-1
0.5064 USD/h 5.064 USD/h
London (GB) / eu-west-2
0.8367 USD/h 5.273 USD/h
Seoul (KR) / ap-northeast-2
1.1342 USD/h 5.4 USD/h
Frankfurt (DE) / eu-central-1
1.267233 USD/h 5.4 USD/h
Sydney (AU) / ap-southeast-2
1.1818 USD/h 5.424 USD/h
Singapore (SG) / ap-southeast-1
1.978667 USD/h 5.424 USD/h
Tokyo (JP) / ap-northeast-1
1.0009 USD/h 5.448 USD/h

Processor

vCPUs
48
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
24
CPU Speed
4 GHz
CPU Architecture
x86_64
CPU Manufacturer
Intel
CPU Family
Xeon
CPU Model
8151
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
1 MiB
CPU L2 Cache Total
24 MiB
CPU L3 Cache
25 MiB
CPU L3 Cache Total
50 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, ss, ht, syscall, nx, pdpe1gb, rdtscp, lm, constant_tsc, arch_perfmon, rep_good, nopl, xtopology, nonstop_tsc, cpuid, aperfmperf, tsc_known_freq, pni, pclmulqdq, monitor, ssse3, fma, cx16, pcid, sse4_1, sse4_2, x2apic, movbe, popcnt, tsc_deadline_timer, aes, xsave, avx, f16c, rdrand, hypervisor, lahf_lm, abm, 3dnowprefetch, pti, fsgsbase, tsc_adjust, bmi1, avx2, smep, bmi2, erms, invpcid, mpx, avx512f, avx512dq, rdseed, adx, smap, clflushopt, clwb, avx512cd, avx512bw, avx512vl, xsaveopt, xsavec, xgetbv1, xsaves, ida, arat, pku, ospke
Ecpus
31.6
Scalability
65.83

System Resources and Accelerators

MEMORY
Memory Amount
384 GiB
Memory Amount Actual
384 GiB
Memory Generation
DDR4
Memory Speed
2666 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
    25 Gbps
    Network Speed Max
    25 Gbps
    Network Storage Speed Baseline
    19 Gbps
    Network Storage Speed Max
    19 Gbps
    Inbound Traffic
    0 GB/month
    Outbound Traffic
    0 GB/month
    IPv4
    0

    Server Description

    A high-frequency compute and memory-optimized platform featuring dedicated 4.0 GHz cores and integrated local NVMe SSD storage.

    Memory OptimizedCompute OptimizedStorage & Database

    Amazon Web Services z1d.12xlarge is a high-frequency, memory-optimized instance built on the AWS Nitro hypervisor. It features 48 vCPUs powered by an Intel Xeon 8151 processor running at 4.0 GHz on the x86_64 architecture. The hardware configuration includes 384.0 GB of DDR4 memory and 1800 GB of local NVMe SSD storage, alongside a 25 Gbps baseline network bandwidth. Benchmark data highlights strong memory performance, with large-block read-only bandwidth reaching 215.38 GB/sec, while CPU and database operations perform in the average tier. The instance is qualitatively cost-efficient for workloads that require high single-core compute speeds combined with high memory density and fast local storage. It is well-suited for relational databases, electronic design automation (EDA), and financial simulation workloads.

    Economics

    Average Price per Region

    Prices per Zone

    Lowest Prices

    Performance

    Workload Profiles

    2.2Score
    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) 5,284,045 ops/sec 1,919,289 ops/sec 2.8 50.00% 50.00% +67.00%
    Redis RPS (pipeline=16, SET) 29,214,341 ops/sec 11,728,058 ops/sec 2.4 20.00% 20.00% +19.00%
    PassMark Memory Mark (composite) 2,813 2,416 1.2 10.00% 10.00% +1.80%
    Memory bandwidth (read, 16 MB ~ L3) 228,473 MB/sec 108,466 MB/sec 2.1 10.00% 10.00% +7.70%
    PassMark single-thread CPU 2,333 Mops/s 2,365 Mops/s 0.96 10.00% 10.00% -0.41%

    Memory Bandwidth

    Compression

    OpenSSL

    Geekbench Single-Core

    Score: 1,312

    Geekbench Multi-Core

    Score: 11,997

    Passmark CPU Scores

    BENCHMARKSCORE
    Mark
    		 44,394
    Compression
    		 762,769
    Encryption
    		 24,130
    Extended Instructions
    		 49,982
    Floating Point Maths
    		 94,057
    Integer Maths
    		 175,669
    Physics
    		 4,059
    Prime Numbers
    		 216
    Single Threaded
    		 2,333
    String Sorting
    		 87,239

    Passmark Memory Scores

    BENCHMARKSCORE
    Memory Mark
    		 2,813
    Database Operations
    		 18,579
    Memory Latency
    		 52
    Memory Read Cached
    		 27,841
    Memory Read Uncached
    		 10,616
    Memory Write
    		 10,329

    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
    z1d.large 216 GiB0
    z1d.xlarge 432 GiB0
    z1d.2xlarge 864 GiB0
    z1d.3xlarge 1296 GiB0
    z1d.6xlarge 24192 GiB0
    z1d.metal 48384 GiB0

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    z1d.12xlarge FAQs