c7i-flex.12xlarge by Amazon Web Services

c7i-flex.12xlarge is a Compute optimized [Intel processors] Gen7 12xlarge server offered by Amazon Web Services with 48 vCPUs, 96 GiB of memory and 0 GB of storage. The pricing starts at 0.2035 USD per hour.
48 vCPU
96 GiB Memory
Spare SCore
50,466
(All-cores)
2,063
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
c7i-flex.12xlarge
Description
Compute optimized [Intel processors] Gen7 12xlarge
Family
c7i-flex
Hw Virt
Status
active
Observed At
2026-11-03T20:21:23.190812

Availability

REGION / IDSPOTONDEMAND
(MY) / ap-southeast-5
0.537333 USD/h 1.9943 USD/h
(TH) / ap-southeast-7
0.620167 USD/h 1.9943 USD/h
Northern Virgina (US) / us-east-1
0.661 USD/h 2.0349 USD/h
Ohio (US) / us-east-2
0.537867 USD/h 2.0349 USD/h
Mumbai (IN) / ap-south-1
0.626433 USD/h 2.0349 USD/h
Oregon (US) / us-west-2
0.74455 USD/h 2.0349 USD/h
Hyderabad (IN) / ap-south-2
0.6605 USD/h 2.035 USD/h
(MX) / mx-central-1
0.6029 USD/h 2.1366 USD/h
Stockholm (SE) / eu-north-1
0.3985 USD/h 2.1785 USD/h
Aragón (ES) / eu-south-2
0.2275 USD/h 2.1828 USD/h
Dublin (IE) / eu-west-1
1.034867 USD/h 2.1833 USD/h
Quebec (CA) / ca-central-1
0.7175 USD/h 2.2264 USD/h
Seoul (KR) / ap-northeast-2
0.42485 USD/h 2.2982 USD/h
Taipei (TW) / ap-east-2
0.666433 USD/h 2.3054 USD/h
Frankfurt (DE) / eu-central-1
1.130633 USD/h 2.3222 USD/h
Jakarta (ID) / ap-southeast-3
0.2346 USD/h 2.346 USD/h
Singapore (SG) / ap-southeast-1
0.891267 USD/h 2.3466 USD/h
London (GB) / eu-west-2
0.66 USD/h 2.4179 USD/h
Paris (FR) / eu-west-3
0.814433 USD/h 2.4179 USD/h
Milan (IT) / eu-south-1
0.57695 USD/h 2.418 USD/h
California (US) / us-west-1
0.74375 USD/h 2.5376 USD/h
Zurich (CH) / eu-central-2
0.455967 USD/h 2.5546 USD/h
Tokyo (JP) / ap-northeast-1
0.8298 USD/h 2.5616 USD/h
Hong Kong (HK) / ap-east-1
0.5092 USD/h 2.5855 USD/h
Sydney (AU) / ap-southeast-2
0.911233 USD/h 2.6573 USD/h
Cape Town (ZA) / af-south-1
0.326 USD/h 2.729 USD/h
(NZ) / ap-southeast-6
1.1921 USD/h 2.7902 USD/h
Sao Paulo (BR) / sa-east-1
0.590967 USD/h 3.1361 USD/h

Processor

vCPUs
48
Hypervisor
nitro
CPU Allocation
Burstable
CPU Cores
24
CPU Speed
3.2 GHz
CPU Architecture
x86_64
CPU Manufacturer
Intel
CPU Family
Xeon
CPU Model
8488C
CPU L1D Cache
48 KiB
CPU L1D Cache Total
1 MiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
768 KiB
CPU L2 Cache
2 MiB
CPU L2 Cache Total
48 MiB
CPU L3 Cache
105 MiB
CPU L3 Cache Total
105 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, 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, 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
4800 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
      9.375 Gbps
      Network Speed Max
      18.75 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

      Burstable 48-vCPU x86 instance featuring DDR5 memory and Intel AMX matrix extensions for compute-heavy workloads and CPU-based inference.

      Compute OptimizedBurstable & Budget

      Amazon Web Services c7i-flex.12xlarge is a compute-optimized, burstable virtual server built on the AWS Nitro hypervisor. Powered by an x86_64 3.2 GHz Intel Xeon 8488C processor, it delivers 48 vCPUs across 24 physical cores along with 105 MB of L3 cache. The instance includes 96 GB of DDR5 RAM operating at 5 GHz, yielding a 1:2 vCPU-to-RAM ratio optimized for compute-heavy processing. Built-in hardware accelerators support Intel Advanced Matrix Extensions (AMX) and AVX-512, driving strong benchmark results in software compilation, multi-threaded decompression, database operations, and CPU-based LLM inference. It provides a 9 Gbps baseline network interface without bundled local NVMe storage. Because the instance uses a burstable CPU allocation model, it offers a cost-effective alternative to fixed-performance compute nodes for variable workloads. Amazon Web Services c7i-flex.12xlarge is suitable for batch processing, web serving, software build pipelines, and machine learning inference tasks.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      3.3Score
      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) 9,628,038 ops/sec 1,922,940 ops/sec 5.1 50.00% 50.00% +130.00%
      Redis RPS (pipeline=16, SET) 44,766,459 ops/sec 11,785,922 ops/sec 3.8 20.00% 20.00% +31.00%
      PassMark Memory Mark (composite) 2,378 2,415 1 10.00% 10.00% 0.00%
      Memory bandwidth (read, 16 MB ~ L3) 241,283 MB/sec 108,490 MB/sec 2.2 10.00% 10.00% +8.20%
      PassMark single-thread CPU 3,091 Mops/s 2,365 Mops/s 1.3 10.00% 10.00% +2.70%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 2,152

      Geekbench Multi-Core

      Score: 19,030

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 65,056
      Compression
      		 862,699
      Encryption
      		 52,713
      Extended Instructions
      		 66,338
      Floating Point Maths
      		 171,131
      Integer Maths
      		 240,474
      Physics
      		 7,612
      Prime Numbers
      		 380
      Single Threaded
      		 3,091
      String Sorting
      		 115,882

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2,378
      Database Operations
      		 24,332
      Memory Latency
      		 72
      Memory Read Cached
      		 26,840
      Memory Read Uncached
      		 9,243
      Memory Write
      		 13,460

      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
      c7i-flex.large 24 GiB0
      c7i-flex.xlarge 48 GiB0
      c7i-flex.2xlarge 816 GiB0
      c7i-flex.4xlarge 1632 GiB0
      c7i-flex.8xlarge 3264 GiB0
      c7i-flex.16xlarge 64128 GiB0

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      c7i-flex.12xlarge FAQs