c8i.12xlarge by Amazon Web Services

c8i.12xlarge is a Compute optimized [Intel processors] Gen8 12xlarge server offered by Amazon Web Services with 48 vCPUs, 96 GiB of memory and 0 GB of storage. The pricing starts at 0.2249 USD per hour.
48 vCPU
96 GiB Memory
Spare SCore
51,904
(All-cores)
2,120
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
c8i.12xlarge
Description
Compute optimized [Intel processors] Gen8 12xlarge
Family
c8i
Hw Virt
Average Time To Start
6.5
Status
active
Observed At
2026-10-28T07:45:08.682197

Availability

REGION / IDSPOTONDEMAND
(MY) / ap-southeast-5
0.7229 USD/h 2.2042 USD/h
Hyderabad (IN) / ap-south-2
0.2249 USD/h 2.249 USD/h
Ohio (US) / us-east-2
0.7157 USD/h 2.249 USD/h
Oregon (US) / us-west-2
0.828225 USD/h 2.249 USD/h
Mumbai (IN) / ap-south-1
0.732433 USD/h 2.249 USD/h
Northern Virgina (US) / us-east-1
1.00422 USD/h 2.249 USD/h
Stockholm (SE) / eu-north-1
0.863133 USD/h 2.4079 USD/h
Aragón (ES) / eu-south-2
0.349967 USD/h 2.413 USD/h
Dublin (IE) / eu-west-1
1.122267 USD/h 2.4132 USD/h
Quebec (CA) / ca-central-1
0.675267 USD/h 2.4607 USD/h
Seoul (KR) / ap-northeast-2
0.490825 USD/h 2.5402 USD/h
Frankfurt (DE) / eu-central-1
0.974867 USD/h 2.5666 USD/h
Singapore (SG) / ap-southeast-1
0.9532 USD/h 2.5932 USD/h
Paris (FR) / eu-west-3
1.081233 USD/h 2.6724 USD/h
London (GB) / eu-west-2
0.8111 USD/h 2.6724 USD/h
California (US) / us-west-1
0.7107 USD/h 2.8046 USD/h
Tokyo (JP) / ap-northeast-1
0.923867 USD/h 2.8313 USD/h
Sydney (AU) / ap-southeast-2
0.9281 USD/h 2.9371 USD/h
Cape Town (ZA) / af-south-1
0.5812 USD/h 3.0166 USD/h
(NZ) / ap-southeast-6
0.442567 USD/h 3.084 USD/h
Sao Paulo (BR) / sa-east-1
1.33725 USD/h 3.4663 USD/h

Processor

vCPUs
48
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
24
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
1 MiB
CPU L1I Cache
64 KiB
CPU L1I Cache Total
2 MiB
CPU L2 Cache
2 MiB
CPU L2 Cache Total
48 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
24.5
Scalability
51.04

System Resources and Accelerators

MEMORY
Memory Amount
96 GiB
Memory Amount Actual
96 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
      22.5 Gbps
      Network Speed Max
      22.5 Gbps
      Network Storage Speed Baseline
      15 Gbps
      Network Storage Speed Max
      15 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      CPU and System Topology

      Server Description

      A compute-optimized x86_64 platform featuring forty-eight virtual cores and high-speed DDR5 memory for intensive processing workloads.

      Compute OptimizedGeneral Purpose

      Amazon Web Services c8i.12xlarge is a compute-optimized instance featuring 48 vCPUs and 24 physical Intel Xeon 6975P-C cores running at 3.9 GHz on the x86_64 architecture. Built on the AWS Nitro hypervisor, it is equipped with 96.0 GB of DDR5 memory at 7 GHz, yielding 2.0 GB of RAM per core. The instance lacks local storage and dedicated GPUs, but provides a baseline network bandwidth of 22 Gbps. Performance benchmarks show strong capabilities in software compilation, ray tracing, and database operations, with top-tier results in image and text processing. The processor supports Advanced Matrix Extensions and Advanced Vector Extensions, making it highly efficient for vector and integer math. This instance is suited for compute-intensive workloads, including static web serving, software development pipelines, and small-scale language model inference.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      3.7Score
      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) 10,684,417 ops/sec 1,919,289 ops/sec 5.8 50.00% 50.00% +140.00%
      Redis RPS (pipeline=16, SET) 59,282,888 ops/sec 11,728,058 ops/sec 4.9 20.00% 20.00% +37.00%
      PassMark Memory Mark (composite) 2,657 2,416 1.1 10.00% 10.00% +0.96%
      Memory bandwidth (read, 16 MB ~ L3) 240,243 MB/sec 108,466 MB/sec 2.2 10.00% 10.00% +8.20%
      PassMark single-thread CPU 3,256 Mops/s 2,365 Mops/s 1.4 10.00% 10.00% +3.40%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 2,196

      Geekbench Multi-Core

      Score: 20,153

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 69,280
      Compression
      		 952,565
      Encryption
      		 54,673
      Extended Instructions
      		 67,603
      Floating Point Maths
      		 179,317
      Integer Maths
      		 247,683
      Physics
      		 8,599
      Prime Numbers
      		 491
      Single Threaded
      		 3,256
      String Sorting
      		 125,295

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2,657
      Database Operations
      		 24,133
      Memory Latency
      		 68
      Memory Read Cached
      		 26,767
      Memory Read Uncached
      		 16,157
      Memory Write
      		 11,395

      Stress-ng Stressors

      CPU integerSingleMultiScaling
      atomic
      		 184.41 135 0.73×
      bitops
      		 163,595 4,570,899 27.94×
      branch
      		 153,078 6,023,458 39.35×
      funccall
      		 848.84 26,351 31.04×
      funcret
      		 13,924 527,727 37.90×
      hash
      		 187,445 6,672,912 35.60×
      intmath
      		 70,409 2,089,619 29.68×
      nop
      		 287,078 7,465,875 26.01×
      prime
      		 520,901 16,682,006 32.03×
      rotate
      		 108,199 4,650,129 42.98×
      str
      		 1,075,884 35,217,634 32.73×
      wcs
      		 804,702 21,559,717 26.79×
      CryptographySingleMultiScaling
      crypt
      		 3,700 113,166 30.58×
      CompressionSingleMultiScaling
      jpeg
      		 917.31 28,315 30.87×
      zlib
      		 47.8 2,637 55.17×
      HypervisorSingleMultiScaling
      clock
      		 47,026 515,355 10.96×
      clone
      		 441.73 10,833 24.52×
      context
      		 5,782 232,616 40.23×
      cpu-sched
      		 66.47 3,007 45.24×
      eventfd
      		 36,509 2,333,768 63.92×
      fault
      		 35,003 229,046 6.54×
      fork
      		 4,861 130,299 26.81×
      getrandom
      		 63,581 2,291,487 36.04×
      hrtimers
      		 1,653,606 6,958,287 4.21×
      mprotect
      		 1,002,925 16,440,339 16.39×
      mtx
      		 27,103,659 1,333,271,521 49.19×
      munmap
      		 3,782 121,313 32.08×
      null
      		 997,028 38,910,125 39.03×
      pipe
      		 756,833 36,353,830 48.03×
      priv-instr
      		 895,499 16,165,901 18.05×
      resched
      		 16,490,663 8,061,857 0.49×
      switch
      		 85,312 20,573,192 241.15×
      timermix
      		 197,721 8,353,734 42.25×
      tlb-shootdown
      		 11,043 109,949 9.96×
      tsc
      		 632,277 24,787,861 39.20×
      usersyscall
      		 760,122 15,027,583 19.77×
      vdso
      		 95,431,025 3,573,043,612 37.44×
      vfork
      		 24,079 192,526 8.00×
      x86syscall
      		 10,937,332 449,270,734 41.08×
      yield
      		 56,603,533 79,417,006 1.40×
      zero
      		 6,983,303 275,956,322 39.52×
      CPU float/SIMDSingleMultiScaling
      eigen
      		 18,045 562,063 31.15×
      expmath
      		 3,835 137,380 35.82×
      fma
      		 1,311,167 43,925,007 33.50×
      fp
      		 231.37 8,117 35.08×
      fractal
      		 7.6 253.65 33.38×
      hyperbolic
      		 4,444 159,370 35.86×
      logmath
      		 5,668 220,273 38.86×
      matrix
      		 5,789 168,115 29.04×
      matrix-3d
      		 616.06 8,249 13.39×
      monte-carlo
      		 322.69 12,721 39.42×
      mpfr
      		 1,906 58,567 30.73×
      powmath
      		 2,153 80,726 37.49×
      trig
      		 2,994 94,979 31.73×
      veccmp
      		 25,772 750,849 29.13×
      vecfp
      		 1,657 50,788 30.66×
      vecmath
      		 4,213 144,818 34.37×
      vecshuf
      		 887.17 24,569 27.69×
      vecwide
      		 36,818 985,581 26.77×
      AlgorithmsSingleMultiScaling
      bitonicsort
      		 10.6 317.59 29.96×
      bsearch
      		 341.34 9,937 29.11×
      bubblesort
      		 1.2 38.4 32.00×
      fibsearch
      		 333.78 10,068 30.16×
      heapsort
      		 10.8 366.99 33.98×
      hsearch
      		 9,230 280,527 30.39×
      insertionsort
      		 14 336 24.00×
      malloc
      		 2,951,278 62,944,617 21.33×
      mcontend
      		 126.12 9,263 73.44×
      mergesort
      		 33.6 1,175 34.97×
      qsort
      		 24 818.32 34.10×
      skiplist
      		 6,988 263,357 37.68×
      tree
      		 1.6 42.75 26.72×
      MemorySingleMultiScaling
      cache
      		 334,616 4,782,050 14.29×
      cachehammer
      		 176,524 6,151,128 34.85×
      cacheline
      		 39.58 3,996 100.97×
      l1cache
      		 808.92 9,994 12.35×
      memcpy
      		 763.24 18,844 24.69×
      memrate
      		 0.13 6.14 47.23×
      memthrash
      		 215.04 1,403 6.53×
      ptr-chase
      		 25,728,968 346,712,016 13.48×
      spinmem
      		 226.59 2,264 9.99×
      stream
      		 4.47 1,615 361.29×
      vm
      		 146,524 298,106 2.03×

      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.16xlarge 64128 GiB0
      c8i.24xlarge 96192 GiB0

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      c8i.12xlarge FAQs