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c5n.18xlarge by Amazon Web Services

c5n.18xlarge is a Compute optimized [Network and EBS optimized] Gen5 18xlarge server offered by Amazon Web Services with 72 vCPUs, 192 GiB of memory and 0 GB of storage. The pricing starts at 0.4464 USD per hour.
72 vCPU
192 GiB Memory
Spare SCore
66661
(All-cores)
1425
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
c5n.18xlarge
Description
Compute optimized [Network and EBS optimized] Gen5 18xlarge
Family
c5n
Hw Virt
Status
active
Observed At
2026-08-11T00:29:44.542428

Availability

REGION / IDSPOTONDEMAND
Mumbai (IN) / ap-south-1
0.971867 USD/h 3.888 USD/h
Oregon (US) / us-west-2
1.409175 USD/h 3.888 USD/h
Northern Virgina (US) / us-east-1
1.41966 USD/h 3.888 USD/h
Ohio (US) / us-east-2
1.457667 USD/h 3.888 USD/h
Stockholm (SE) / eu-north-1
0.638833 USD/h 4.176 USD/h
Quebec (CA) / ca-central-1
1.233633 USD/h 4.248 USD/h
Seoul (KR) / ap-northeast-2
1.203533 USD/h 4.392 USD/h
Dublin (IE) / eu-west-1
1.813067 USD/h 4.392 USD/h
Frankfurt (DE) / eu-central-1
1.508633 USD/h 4.428 USD/h
Jakarta (ID) / ap-southeast-3
0.489333 USD/h 4.464 USD/h
Singapore (SG) / ap-southeast-1
1.8358 USD/h 4.464 USD/h
London (GB) / eu-west-2
1.7852 USD/h 4.608 USD/h
Paris (FR) / eu-west-3
1.402667 USD/h 4.608 USD/h
Milan (IT) / eu-south-1
1.1243 USD/h 4.644 USD/h
California (US) / us-west-1
1.6579 USD/h 4.86 USD/h
Osaka (JP) / ap-northeast-3
1.6347 USD/h 4.896 USD/h
Tokyo (JP) / ap-northeast-1
1.111233 USD/h 4.896 USD/h
Sydney (AU) / ap-southeast-2
1.484633 USD/h 5.076 USD/h
Hong Kong (HK) / ap-east-1
1.3519 USD/h 5.148 USD/h
Cape Town (ZA) / af-south-1
1.089833 USD/h 5.227 USD/h
Sao Paulo (BR) / sa-east-1
1.088433 USD/h 5.976 USD/h

Processor

vCPUs
72
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
36
CPU Speed
3.4 GHz
CPU Architecture
x86_64
CPU Manufacturer
Intel
CPU Family
Xeon
CPU Model
8124M
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
1 MiB
CPU L2 Cache Total
36 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
46.8
Scalability
130

System Resources and Accelerators

MEMORY
Memory Amount
192 GiB
Memory Amount Actual
192 GiB
Memory Generation
DDR4
Memory Speed
2666 Mhz
GPU
GPU Count
0
GPU Memory Min
0 MiB
GPU Memory Total
0 MiB
GPUs
    STORAGE
    Storage Size
    0 GB
    Storages
      NETWORK
      Network Speed Baseline
      100 Gbps
      Network Speed Max
      100 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 compute-optimized, high-bandwidth x86_64 instance featuring 72 vCPUs and 100 Gbps networking for demanding multi-threaded and network-bound workloads.

      Compute OptimizedGeneral Purpose

      Amazon Web Services c5n.18xlarge is a compute-optimized instance powered by the Nitro hypervisor and an Intel Xeon 8124M processor. It features 72 vCPUs (36 physical cores) running at 3.4 GHz, paired with 192.0 GB of DDR4 memory. The instance lacks local storage and GPU accelerators but provides a baseline network bandwidth of 100 Gbps. Performance benchmarks indicate strong multi-core CPU capabilities and high memory read bandwidth, alongside strong database operation scores. Conversely, single-core execution and LLM text generation speeds are relatively limited, with a 7B model generating only 7.23 tokens per second. This profile makes the instance suitable for network-intensive compute tasks, distributed database nodes, and multi-threaded processing workloads that leverage its high network throughput and multi-core capacity without requiring local physical disks.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      2.49Score
      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) 6,559,823 ops/sec 1,910,660 ops/sec 3.43 50.00% 50.00% +85.20%
      Redis RPS (pipeline=16, SET) 36,856,151 ops/sec 11,608,287 ops/sec 3.17 20.00% 20.00% +26.00%
      PassMark Memory Mark (composite) 2,702 2,416 1.12 10.00% 10.00% +1.14%
      Memory bandwidth (read, 16 MB ~ L3) 215,894 MB/sec 107,896 MB/sec 2 10.00% 10.00% +7.18%
      PassMark single-thread CPU 2,012 Mops/s 2,364 Mops/s 0.851 10.00% 10.00% -1.60%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 1,191

      Geekbench Multi-Core

      Score: 12,018

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 49891
      Compression
      		 965974
      Encryption
      		 30390
      Extended Instructions
      		 65811
      Floating Point Maths
      		 119649
      Integer Maths
      		 223544
      Physics
      		 4397
      Prime Numbers
      		 266
      Single Threaded
      		 2012
      String Sorting
      		 111294

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2702
      Database Operations
      		 22221
      Memory Latency
      		 52
      Memory Read Cached
      		 24397
      Memory Read Uncached
      		 10419
      Memory Write
      		 10082

      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
      c5n.large 25 GiB0
      c5n.xlarge 411 GiB0
      c5n.2xlarge 821 GiB0
      c5n.4xlarge 1642 GiB0
      c5n.9xlarge 3696 GiB0
      c5n.metal 72192 GiB0

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      c5n.18xlarge FAQs