c8i-flex.12xlarge by Amazon Web Services

c8i-flex.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 0.2136 USD per hour.
48 vCPU
96 GiB Memory
Spare SCore
51,993
(All-cores)
2,123
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
c8i-flex.12xlarge
Description
Compute optimized [Intel processors] Gen8 12xlarge
Family
c8i-flex
Hw Virt
Status
active
Observed At
2026-10-29T02:46:22.887042

Availability

REGION / IDSPOTONDEMAND
(MY) / ap-southeast-5
0.610433 USD/h 2.094 USD/h
Hyderabad (IN) / ap-south-2
0.2136 USD/h 2.1365 USD/h
Ohio (US) / us-east-2
0.623067 USD/h 2.1365 USD/h
Mumbai (IN) / ap-south-1
0.709433 USD/h 2.1365 USD/h
Oregon (US) / us-west-2
0.8164 USD/h 2.1365 USD/h
Northern Virgina (US) / us-east-1
0.80518 USD/h 2.1365 USD/h
Aragón (ES) / eu-south-2
0.6367 USD/h 2.2922 USD/h
Dublin (IE) / eu-west-1
1.076967 USD/h 2.2925 USD/h
Quebec (CA) / ca-central-1
0.600967 USD/h 2.3376 USD/h
Seoul (KR) / ap-northeast-2
0.387825 USD/h 2.4132 USD/h
Frankfurt (DE) / eu-central-1
1.045033 USD/h 2.4382 USD/h
Singapore (SG) / ap-southeast-1
0.9198 USD/h 2.4636 USD/h
Paris (FR) / eu-west-3
0.431967 USD/h 2.5387 USD/h
London (GB) / eu-west-2
0.922 USD/h 2.5387 USD/h
California (US) / us-west-1
0.58905 USD/h 2.6645 USD/h
Tokyo (JP) / ap-northeast-1
0.863433 USD/h 2.6897 USD/h
Sydney (AU) / ap-southeast-2
0.8298 USD/h 2.7902 USD/h
Cape Town (ZA) / af-south-1
0.6112 USD/h 2.8656 USD/h
(NZ) / ap-southeast-6
0.915833 USD/h 2.9297 USD/h
Sao Paulo (BR) / sa-east-1
0.454167 USD/h 3.293 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, rep_good, nopl, xtopology, nonstop_tsc, cpuid, tsc_known_freq, pni, pclmulqdq, 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
      11.25 Gbps
      Network Speed Max
      22.5 Gbps
      Network Storage Speed Baseline
      7.5 Gbps
      Network Storage Speed Max
      15 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      Server Description

      A compute-optimized virtual server featuring forty-eight vCPUs and DDR5 memory, engineered for high-throughput processing and CPU-based machine learning inference.

      Compute OptimizedGeneral Purpose

      Amazon Web Services c8i-flex.12xlarge is a compute-optimized instance powered by the Nitro hypervisor. It features 48 dedicated vCPUs from an Intel Xeon 6975P-C processor running at 3.9 GHz, paired with 96.0 GB of DDR5 memory at 7 GHz. Lacking local storage and GPUs, the instance relies on an 11 Gbps baseline network bandwidth. Benchmarks show strong performance, including a Passmark CPU score of 69241.15 and top-tier results in image processing and small-model LLM text generation. Supported by advanced instruction sets like AVX-512 and Intel AMX, the c8i-flex.12xlarge is highly efficient for compute-heavy workloads such as software compilation, database operations, static web serving, and CPU-based machine learning 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) 10,504,191 ops/sec 1,919,289 ops/sec 5.8 50.00% 50.00% +140.00%
      Redis RPS (pipeline=16, SET) 58,785,840 ops/sec 11,728,058 ops/sec 4.9 20.00% 20.00% +37.00%
      PassMark Memory Mark (composite) 2,446 2,416 1 10.00% 10.00% 0.00%
      Memory bandwidth (read, 16 MB ~ L3) 237,245 MB/sec 108,466 MB/sec 2.2 10.00% 10.00% +8.20%
      PassMark single-thread CPU 3,280 Mops/s 2,365 Mops/s 1.4 10.00% 10.00% +3.40%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 2,176

      Geekbench Multi-Core

      Score: 19,330

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 69,241
      Compression
      		 956,449
      Encryption
      		 54,755
      Extended Instructions
      		 67,435
      Floating Point Maths
      		 179,588
      Integer Maths
      		 247,624
      Physics
      		 8,054
      Prime Numbers
      		 480
      Single Threaded
      		 3,280
      String Sorting
      		 124,618

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2,446
      Database Operations
      		 22,993
      Memory Latency
      		 71
      Memory Read Cached
      		 28,933
      Memory Read Uncached
      		 10,111
      Memory Write
      		 11,788

      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
      c8i-flex.large 24 GiB0
      c8i-flex.xlarge 48 GiB0
      c8i-flex.2xlarge 816 GiB0
      c8i-flex.4xlarge 1632 GiB0
      c8i-flex.8xlarge 3264 GiB0
      c8i-flex.16xlarge 64128 GiB0

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      c8i-flex.12xlarge FAQs