logo

c5a.12xlarge by Amazon Web Services

c5a.12xlarge is a Compute optimized [AMD processors] Gen5 12xlarge server offered by Amazon Web Services with 48 vCPUs, 96 GiB of memory and 0 GB of storage. The pricing starts at 0.2328 USD per hour.
48 vCPU
96 GiB Memory
Spare SCore
18393
(All-cores)
762
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
c5a.12xlarge
Description
Compute optimized [AMD processors] Gen5 12xlarge
Family
c5a
Hw Virt
Status
active
Observed At
2026-07-20T16:14:05.430582

Availability

REGION / IDSPOTONDEMAND
Mumbai (IN) / ap-south-1
0.499233 USD/h 1.128 USD/h
Northern Virgina (US) / us-east-1
0.74524 USD/h 1.848 USD/h
Oregon (US) / us-west-2
0.733975 USD/h 1.848 USD/h
Ohio (US) / us-east-2
0.747833 USD/h 1.848 USD/h
Stockholm (SE) / eu-north-1
0.372167 USD/h 1.968 USD/h
Quebec (CA) / ca-central-1
0.766667 USD/h 2.016 USD/h
Seoul (KR) / ap-northeast-2
0.6409 USD/h 2.064 USD/h
Dublin (IE) / eu-west-1
1.006267 USD/h 2.064 USD/h
Frankfurt (DE) / eu-central-1
0.8152 USD/h 2.088 USD/h
Singapore (SG) / ap-southeast-1
0.760467 USD/h 2.112 USD/h
Milan (IT) / eu-south-1
0.421933 USD/h 2.184 USD/h
Paris (FR) / eu-west-3
0.86555 USD/h 2.184 USD/h
London (GB) / eu-west-2
0.957933 USD/h 2.184 USD/h
California (US) / us-west-1
0.7979 USD/h 2.28 USD/h
Tokyo (JP) / ap-northeast-1
0.8456 USD/h 2.304 USD/h
Hong Kong (HK) / ap-east-1
1.084767 USD/h 2.328 USD/h
Sydney (AU) / ap-southeast-2
0.9033 USD/h 2.4 USD/h
Cape Town (ZA) / af-south-1
0.422167 USD/h 2.472 USD/h
Sao Paulo (BR) / sa-east-1
0.9645 USD/h 2.832 USD/h

Processor

vCPUs
48
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
24
CPU Speed
3.3 GHz
CPU Architecture
x86_64
CPU Manufacturer
AMD
CPU Family
EPYC
CPU Model
7R32
CPU L1D Cache
32 KiB
CPU L1D Cache Total
768 KiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
768 KiB
CPU L2 Cache
512 KiB
CPU L2 Cache Total
12 MiB
CPU L3 Cache
16 MiB
CPU L3 Cache Total
96 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, ht, syscall, nx, mmxext, fxsr_opt, pdpe1gb, rdtscp, lm, constant_tsc, rep_good, nopl, nonstop_tsc, cpuid, extd_apicid, aperfmperf, tsc_known_freq, pni, pclmulqdq, ssse3, fma, cx16, sse4_1, sse4_2, movbe, popcnt, aes, xsave, avx, f16c, rdrand, hypervisor, lahf_lm, cmp_legacy, cr8_legacy, abm, sse4a, misalignsse, 3dnowprefetch, topoext, ssbd, ibrs, ibpb, stibp, vmmcall, fsgsbase, bmi1, avx2, smep, bmi2, rdseed, adx, smap, clflushopt, clwb, sha_ni, xsaveopt, xsavec, xgetbv1, clzero, xsaveerptr, rdpru, wbnoinvd, arat, npt, nrip_save, rdpid
Ecpus
24.1
Scalability
100.42

System Resources and Accelerators

MEMORY
Memory Amount
96 GiB
Memory Amount Actual
96 GiB
Memory Generation
DDR4
Memory Speed
2933 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
      12 Gbps
      Network Speed Max
      12 Gbps
      Network Storage Speed Baseline
      4.75 Gbps
      Network Storage Speed Max
      4.75 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      Server Description

      A core-dense, compute-optimized virtual machine featuring AMD EPYC processors, tailored for parallelized multi-threaded workloads and cryptographic tasks.

      Compute OptimizedGeneral Purpose

      Amazon Web Services c5a.12xlarge is an x86_64 compute-optimized instance powered by a 3.3 GHz AMD EPYC 7R32 processor with 48 vCPUs, 24 physical cores, and 96.0 GB of DDR4 RAM. Operating on the Nitro hypervisor, it delivers a baseline network bandwidth of 12 Gbps, though it lacks local storage and GPU accelerators. Benchmark results show a clear tradeoff: single-core CPU performance is poor, ranking in the bottom 10%, whereas multi-core capabilities and memory performance are average to strong, with PassMark memory and CPU encryption tests scoring in the top 25%. This hardware profile is suited for multi-threaded workloads, including software compilation, static web serving, and moderate database operations, where parallel execution can leverage the 48 vCPUs. It offers a cost-efficient option for core-dense processing tasks that do not require high per-core memory or local SSDs.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      1.57Score
      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) 3,547,441 ops/sec 1,895,870 ops/sec 1.87 50.00% 50.00% +36.70%
      Redis RPS (pipeline=16, SET) 23,269,335 ops/sec 11,503,938 ops/sec 2.02 20.00% 20.00% +15.10%
      PassMark Memory Mark (composite) 2,874 2,410 1.19 10.00% 10.00% +1.75%
      Memory bandwidth (read, 16 MB ~ L3) 98,682 MB/sec 107,331 MB/sec 0.919 10.00% 10.00% -0.84%
      PassMark single-thread CPU 2,139 Mops/s 2,363 Mops/s 0.905 10.00% 10.00% -0.99%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 1,342

      Geekbench Multi-Core

      Score: 12,873

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		46486
      Compression
      		710243
      Encryption
      		51159
      Extended Instructions
      		44552
      Floating Point Maths
      		96706
      Integer Maths
      		162121
      Physics
      		4555
      Prime Numbers
      		235
      Single Threaded
      		2139
      String Sorting
      		98581

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		2874
      Database Operations
      		16333
      Memory Latency
      		51
      Memory Read Cached
      		24679
      Memory Read Uncached
      		12716
      Memory Write
      		13452

      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
      c5a.large 24 GiB0
      c5a.xlarge 48 GiB0
      c5a.2xlarge 816 GiB0
      c5a.4xlarge 1632 GiB0
      c5a.8xlarge 3264 GiB0
      c5a.16xlarge 64128 GiB0
      c5a.24xlarge 96192 GiB0

      Similar Servers

      INSTANCEVENDORvCPUsMEMORYGPUs

      c5a.12xlarge FAQs