c8i.16xlarge by Amazon Web Services

c8i.16xlarge is a Compute optimized [Intel processors] Gen8 16xlarge server offered by Amazon Web Services with 64 vCPUs, 128 GiB of memory and 0 GB of storage. The pricing starts at 0.2999 USD per hour.
64 vCPU
128 GiB Memory
Spare SCore
69,204
(All-cores)
2,120
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
c8i.16xlarge
Description
Compute optimized [Intel processors] Gen8 16xlarge
Family
c8i
Hw Virt
Average Time To Start
7.5
Status
active
Observed At
2026-10-29T10:04:49.281043

Availability

REGION / IDSPOTONDEMAND
(MY) / ap-southeast-5
0.747767 USD/h 2.9389 USD/h
Hyderabad (IN) / ap-south-2
0.2999 USD/h 2.9987 USD/h
Ohio (US) / us-east-2
0.9027 USD/h 2.9987 USD/h
Mumbai (IN) / ap-south-1
0.772867 USD/h 2.9987 USD/h
Northern Virgina (US) / us-east-1
1.36436 USD/h 2.9987 USD/h
Oregon (US) / us-west-2
1.304725 USD/h 2.9987 USD/h
Stockholm (SE) / eu-north-1
0.8923 USD/h 3.2106 USD/h
Aragón (ES) / eu-south-2
1.302233 USD/h 3.2173 USD/h
Dublin (IE) / eu-west-1
1.581133 USD/h 3.2176 USD/h
Quebec (CA) / ca-central-1
0.977067 USD/h 3.281 USD/h
Seoul (KR) / ap-northeast-2
0.82035 USD/h 3.3869 USD/h
Frankfurt (DE) / eu-central-1
1.383833 USD/h 3.4221 USD/h
Singapore (SG) / ap-southeast-1
1.244667 USD/h 3.4576 USD/h
Paris (FR) / eu-west-3
0.887233 USD/h 3.5632 USD/h
London (GB) / eu-west-2
0.909467 USD/h 3.5632 USD/h
California (US) / us-west-1
0.9489 USD/h 3.7395 USD/h
Tokyo (JP) / ap-northeast-1
1.6559 USD/h 3.775 USD/h
Sydney (AU) / ap-southeast-2
1.2717 USD/h 3.9162 USD/h
Cape Town (ZA) / af-south-1
0.722733 USD/h 4.0221 USD/h
(NZ) / ap-southeast-6
0.515133 USD/h 4.112 USD/h
Sao Paulo (BR) / sa-east-1
1.4527 USD/h 4.6218 USD/h

Processor

vCPUs
64
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
32
CPU Speed
3.9 GHz
CPU Architecture
x86_64
CPU Manufacturer
Intel
CPU Family
Xeon
CPU Model
6975P-C
CPU L1D Cache
48 KiB
CPU L1D Cache Total
2 MiB
CPU L1I Cache
64 KiB
CPU L1I Cache Total
2 MiB
CPU L2 Cache
2 MiB
CPU L2 Cache Total
64 MiB
CPU L3 Cache
480 MiB
CPU L3 Cache Total
480 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, pdcm, pcid, sse4_1, sse4_2, x2apic, movbe, popcnt, tsc_deadline_timer, aes, xsave, avx, f16c, rdrand, hypervisor, lahf_lm, abm, 3dnowprefetch, cpuid_fault, ssbd, ibrs, ibpb, stibp, ibrs_enhanced, fsgsbase, tsc_adjust, bmi1, avx2, smep, bmi2, erms, invpcid, avx512f, avx512dq, rdseed, adx, smap, avx512ifma, clflushopt, clwb, avx512cd, sha_ni, avx512bw, avx512vl, xsaveopt, xsavec, xgetbv1, xsaves, avx_vnni, avx512_bf16, wbnoinvd, ida, arat, avx512vbmi, umip, pku, ospke, waitpkg, avx512_vbmi2, gfni, vaes, vpclmulqdq, avx512_vnni, avx512_bitalg, tme, avx512_vpopcntdq, rdpid, bus_lock_detect, cldemote, movdiri, movdir64b, md_clear, serialize, amx_bf16, avx512_fp16, amx_tile, amx_int8, flush_l1d, arch_capabilities
Ecpus
32.6
Scalability
50.94

System Resources and Accelerators

MEMORY
Memory Amount
128 GiB
Memory Amount Actual
128 GiB
Memory Generation
DDR5
Memory Speed
7200 Mhz
ACCELERATORS
Accelerator Count
0
Accelerator Memory Min
0 MiB
Accelerator Memory Total
0 MiB
Accelerators
    STORAGE
    Storage Size
    0 GB
    Storages
      NETWORK
      Network Speed Baseline
      30 Gbps
      Network Speed Max
      30 Gbps
      Network Storage Speed Baseline
      20 Gbps
      Network Storage Speed Max
      20 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      CPU and System Topology

      Server Description

      A high-frequency, compute-optimized platform featuring advanced matrix extensions and high-speed DDR5 memory for intensive multi-threaded workloads.

      Compute OptimizedGeneral Purpose

      Amazon Web Services c8i.16xlarge is a compute-optimized instance featuring 64 vCPUs and 32 physical cores powered by an Intel Xeon 6975P-C processor running at 3.9 GHz. Built on the Nitro hypervisor, it includes 128.0 GB of high-speed DDR5 memory at 7 GHz, providing 2.0 GB of RAM per core. The instance lacks local storage and GPUs, but delivers a baseline network bandwidth of 30 Gbps. Performance benchmarks place this server in the top tier for multi-core tasks, software compilation, and image processing. It also demonstrates strong capabilities in LLM prompt processing, aided by hardware-level AVX-512 and AMX extensions. This instance is highly suited for compute-intensive workloads, including high-throughput web serving, software development pipelines, and medium-scale inference tasks, offering a balanced, cost-efficient profile for pure CPU processing.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      4.5Score
      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) 14,205,050 ops/sec 1,919,289 ops/sec 7.4 50.00% 50.00% +170.00%
      Redis RPS (pipeline=16, SET) 78,917,282 ops/sec 11,728,058 ops/sec 6.6 20.00% 20.00% +46.00%
      PassMark Memory Mark (composite) 2,783 2,416 1.2 10.00% 10.00% +1.80%
      Memory bandwidth (read, 16 MB ~ L3) 230,784 MB/sec 108,466 MB/sec 2.1 10.00% 10.00% +7.70%
      PassMark single-thread CPU 3,262 Mops/s 2,365 Mops/s 1.4 10.00% 10.00% +3.40%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 2,206

      Geekbench Multi-Core

      Score: 21,074

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 82,985
      Compression
      		 1,274,716
      Encryption
      		 72,691
      Extended Instructions
      		 88,583
      Floating Point Maths
      		 239,091
      Integer Maths
      		 330,236
      Physics
      		 9,344
      Prime Numbers
      		 542
      Single Threaded
      		 3,262
      String Sorting
      		 164,342

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2,783
      Database Operations
      		 29,714
      Memory Latency
      		 66
      Memory Read Cached
      		 28,652
      Memory Read Uncached
      		 17,966
      Memory Write
      		 11,725

      Stress-ng Stressors

      CPU integerSingleMultiScaling
      atomic
      		 195.02 123.82 0.63×
      bitops
      		 163,572 6,105,318 37.33×
      branch
      		 153,085 8,031,063 52.46×
      funccall
      		 852.16 35,030 41.11×
      funcret
      		 13,904 703,727 50.61×
      hash
      		 184,458 8,894,273 48.22×
      intmath
      		 70,407 2,731,444 38.80×
      nop
      		 287,274 9,974,731 34.72×
      prime
      		 521,458 22,288,960 42.74×
      rotate
      		 108,194 6,171,331 57.04×
      str
      		 1,097,220 47,269,203 43.08×
      wcs
      		 799,320 28,904,709 36.16×
      CryptographySingleMultiScaling
      crypt
      		 3,703 150,753 40.72×
      CompressionSingleMultiScaling
      jpeg
      		 907.94 37,783 41.61×
      zlib
      		 69.21 3,478 50.26×
      HypervisorSingleMultiScaling
      clock
      		 44,768 518,405 11.58×
      clone
      		 451.63 13,447 29.78×
      context
      		 5,791 309,968 53.53×
      cpu-sched
      		 80.13 4,106 51.24×
      eventfd
      		 164,928 3,279,141 19.88×
      fault
      		 34,907 221,038 6.33×
      fork
      		 4,801 118,959 24.78×
      getrandom
      		 63,711 3,057,672 47.99×
      hrtimers
      		 1,380,977 9,521,341 6.89×
      mprotect
      		 1,012,618 16,827,605 16.62×
      mtx
      		 13,174,158 1,810,831,473 137.45×
      munmap
      		 3,851 140,947 36.60×
      null
      		 996,223 52,337,765 52.54×
      pipe
      		 770,443 50,412,907 65.43×
      priv-instr
      		 895,659 16,636,668 18.57×
      resched
      		 16,149,089 9,450,174 0.59×
      switch
      		 292,925 26,550,298 90.64×
      timermix
      		 203,066 11,109,318 54.71×
      tlb-shootdown
      		 7,060 134,921 19.11×
      tsc
      		 631,673 33,055,379 52.33×
      usersyscall
      		 759,797 15,926,889 20.96×
      vdso
      		 95,479,215 4,768,178,385 49.94×
      vfork
      		 22,364 174,526 7.80×
      x86syscall
      		 10,935,563 598,352,612 54.72×
      yield
      		 78,139,272 105,672,232 1.35×
      zero
      		 6,977,531 363,739,553 52.13×
      CPU float/SIMDSingleMultiScaling
      eigen
      		 18,037 761,924 42.24×
      expmath
      		 3,828 182,975 47.79×
      fma
      		 1,311,734 58,475,970 44.58×
      fp
      		 242.4 10,963 45.23×
      fractal
      		 7.6 338.28 44.51×
      hyperbolic
      		 4,461 212,068 47.54×
      logmath
      		 5,668 293,953 51.86×
      matrix
      		 5,593 218,225 39.01×
      matrix-3d
      		 617.5 8,339 13.51×
      monte-carlo
      		 322.63 16,844 52.21×
      mpfr
      		 1,909 78,098 40.91×
      powmath
      		 2,154 107,228 49.79×
      trig
      		 2,974 126,868 42.66×
      veccmp
      		 25,727 1,001,635 38.93×
      vecfp
      		 1,659 67,801 40.88×
      vecmath
      		 4,186 193,020 46.11×
      vecshuf
      		 888.29 32,764 36.88×
      vecwide
      		 36,871 1,316,795 35.71×
      AlgorithmsSingleMultiScaling
      bitonicsort
      		 10.6 422.39 39.85×
      bsearch
      		 341.56 13,788 40.37×
      bubblesort
      		 1.2 51.2 42.67×
      fibsearch
      		 335.75 12,772 38.04×
      heapsort
      		 10.8 483.59 44.78×
      hsearch
      		 9,030 375,583 41.59×
      insertionsort
      		 14 447.6 31.97×
      malloc
      		 2,962,646 78,291,625 26.43×
      mcontend
      		 114.89 12,406 107.98×
      mergesort
      		 33.6 1,569 46.68×
      qsort
      		 24 1,092 45.49×
      skiplist
      		 6,983 351,311 50.31×
      tree
      		 1.6 51.12 31.95×
      MemorySingleMultiScaling
      cache
      		 339,302 6,306,728 18.59×
      cachehammer
      		 178,696 7,396,895 41.39×
      cacheline
      		 66.16 3,596 54.36×
      l1cache
      		 809.44 13,173 16.27×
      memcpy
      		 764.34 25,129 32.88×
      memrate
      		 0.13 7.53 57.92×
      memthrash
      		 308.1 1,484 4.82×
      ptr-chase
      		 26,116,986 428,156,198 16.39×
      spinmem
      		 225.4 3,101 13.76×
      stream
      		 4.42 2,170 490.97×
      vm
      		 152,767 300,364 1.97×

      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

      PostgreSQL heavy read-only throughput

      Alternatives

      Servers of the Same Family

      INSTANCEvCPUsMEMORYAccelerators
      c8i.large 24 GiB0
      c8i.xlarge 48 GiB0
      c8i.2xlarge 816 GiB0
      c8i.4xlarge 1632 GiB0
      c8i.8xlarge 3264 GiB0
      c8i.12xlarge 4896 GiB0
      c8i.24xlarge 96192 GiB0

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      c8i.16xlarge FAQs