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c5a.4xlarge by Amazon Web Services

c5a.4xlarge is a Compute optimized [AMD processors] Gen5 4xlarge server offered by Amazon Web Services with 16 vCPUs, 32 GiB of memory and 0 GB of storage. The pricing starts at 0.1838 USD per hour.
16 vCPU
32 GiB Memory
Spare SCore
6143
(All-cores)
767
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
c5a.4xlarge
Description
Compute optimized [AMD processors] Gen5 4xlarge
Family
c5a
Hw Virt
Status
active
Observed At
2026-07-28T18:50:56.387830

Availability

REGION / IDSPOTONDEMAND
Mumbai (IN) / ap-south-1
0.188867 USD/h 0.376 USD/h
Oregon (US) / us-west-2
0.279525 USD/h 0.616 USD/h
Ohio (US) / us-east-2
0.271667 USD/h 0.616 USD/h
Northern Virgina (US) / us-east-1
0.30074 USD/h 0.616 USD/h
Stockholm (SE) / eu-north-1
0.218867 USD/h 0.656 USD/h
Quebec (CA) / ca-central-1
0.349367 USD/h 0.672 USD/h
Seoul (KR) / ap-northeast-2
0.2662 USD/h 0.688 USD/h
Dublin (IE) / eu-west-1
0.391367 USD/h 0.688 USD/h
Frankfurt (DE) / eu-central-1
0.317233 USD/h 0.696 USD/h
Singapore (SG) / ap-southeast-1
0.338467 USD/h 0.704 USD/h
Milan (IT) / eu-south-1
0.204933 USD/h 0.728 USD/h
Paris (FR) / eu-west-3
0.29375 USD/h 0.728 USD/h
London (GB) / eu-west-2
0.323733 USD/h 0.728 USD/h
California (US) / us-west-1
0.3283 USD/h 0.76 USD/h
Tokyo (JP) / ap-northeast-1
0.3395 USD/h 0.768 USD/h
Hong Kong (HK) / ap-east-1
0.653733 USD/h 0.776 USD/h
Sydney (AU) / ap-southeast-2
0.372867 USD/h 0.8 USD/h
Cape Town (ZA) / af-south-1
0.389867 USD/h 0.824 USD/h
Sao Paulo (BR) / sa-east-1
0.334233 USD/h 0.944 USD/h

Processor

vCPUs
16
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
8
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
256 KiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
256 KiB
CPU L2 Cache
512 KiB
CPU L2 Cache Total
4 MiB
CPU L3 Cache
16 MiB
CPU L3 Cache Total
32 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
8
Scalability
100

System Resources and Accelerators

MEMORY
Memory Amount
32 GiB
Memory Amount Actual
32 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
      5 Gbps
      Network Speed Max
      10 Gbps
      Network Storage Speed Baseline
      1.58 Gbps
      Network Storage Speed Max
      3.17 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      Server Description

      An x86_64 compute-optimized instance featuring dedicated AMD EPYC processors and a balanced multi-core profile for compute-focused workloads.

      Compute OptimizedGeneral Purpose

      Amazon Web Services c5a.4xlarge is a compute-optimized instance featuring an AMD EPYC 7R32 processor with 16 vCPUs, 8 physical cores, and 32.0 GB of DDR4 memory. Built on the x86_64 architecture and managed by the Nitro hypervisor, this server provides dedicated CPU resources at 3.3 GHz but lacks local storage, relying on network-attached storage and a 5 Gbps baseline network bandwidth. Performance benchmarks show average multi-core CPU capabilities and standard memory bandwidth for cached operations, though single-core performance and uncached memory bandwidth represent clear tradeoffs, ranking in the bottom 10% and 25% respectively. This resource profile makes the instance a cost-efficient option for multi-threaded workloads that do not require high memory-to-CPU ratios. It is suited for applications such as static web serving, multi-threaded decompression, and software compilation.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      0.705Score
      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) 1,303,835 ops/sec 1,896,415 ops/sec 0.688 50.00% 50.00% -17.10%
      Redis RPS (pipeline=16, SET) 8,735,480 ops/sec 11,539,523 ops/sec 0.757 20.00% 20.00% -5.42%
      PassMark Memory Mark (composite) 2,616 2,411 1.09 10.00% 10.00% +0.87%
      Memory bandwidth (read, 16 MB ~ L3) 37,620 MB/sec 107,368 MB/sec 0.35 10.00% 10.00% -9.97%
      PassMark single-thread CPU 2,133 Mops/s 2,363 Mops/s 0.902 10.00% 10.00% -1.03%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 1,339

      Geekbench Multi-Core

      Score: 7,998

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 19649
      Compression
      		 241366
      Encryption
      		 17092
      Extended Instructions
      		 14801
      Floating Point Maths
      		 32226
      Integer Maths
      		 53973
      Physics
      		 1790
      Prime Numbers
      		 86
      Single Threaded
      		 2133
      String Sorting
      		 33308

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2616
      Database Operations
      		 5712
      Memory Latency
      		 51
      Memory Read Cached
      		 24711
      Memory Read Uncached
      		 12794
      Memory Write
      		 13615

      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.8xlarge 3264 GiB0
      c5a.12xlarge 4896 GiB0
      c5a.16xlarge 64128 GiB0
      c5a.24xlarge 96192 GiB0

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      c5a.4xlarge FAQs