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 0.0897 USD per hour.
16 vCPU
32 GiB Memory
Spare SCore
6,143
(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
2026-10-27T00:00:31.251392

Availability

REGION / IDSPOTONDEMAND
Mumbai (IN) / ap-south-1
0.2082 USD/h 0.376 USD/h
Oregon (US) / us-west-2
0.25545 USD/h 0.616 USD/h
Ohio (US) / us-east-2
0.234733 USD/h 0.616 USD/h
Northern Virgina (US) / us-east-1
0.29188 USD/h 0.616 USD/h
Stockholm (SE) / eu-north-1
0.105733 USD/h 0.656 USD/h
Quebec (CA) / ca-central-1
0.3011 USD/h 0.672 USD/h
Seoul (KR) / ap-northeast-2
0.179367 USD/h 0.688 USD/h
Dublin (IE) / eu-west-1
0.3761 USD/h 0.688 USD/h
Frankfurt (DE) / eu-central-1
0.316 USD/h 0.696 USD/h
Singapore (SG) / ap-southeast-1
0.3807 USD/h 0.704 USD/h
Milan (IT) / eu-south-1
0.211133 USD/h 0.728 USD/h
London (GB) / eu-west-2
0.307633 USD/h 0.728 USD/h
Paris (FR) / eu-west-3
0.31685 USD/h 0.728 USD/h
California (US) / us-west-1
0.26385 USD/h 0.76 USD/h
Tokyo (JP) / ap-northeast-1
0.3629 USD/h 0.768 USD/h
Hong Kong (HK) / ap-east-1
0.331133 USD/h 0.776 USD/h
Sydney (AU) / ap-southeast-2
0.3912 USD/h 0.8 USD/h
Cape Town (ZA) / af-south-1
0.3912 USD/h 0.824 USD/h
Sao Paulo (BR) / sa-east-1
0.160867 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
50

System Resources and Accelerators

MEMORY
Memory Amount
32 GiB
Memory Amount Actual
32 GiB
Memory Generation
DDR4
Memory Speed
2933 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
      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

      A dedicated AMD EPYC compute instance offering balanced multi-core performance and DDR4 memory for parallel processing workloads without local storage.

      Compute OptimizedGeneral Purpose

      Amazon Web Services c5a.4xlarge is a compute-optimized instance featuring an AMD EPYC 7R32 processor with 16 dedicated vCPUs (8 physical cores) running at 3.3 GHz and 32.0 GB of DDR4 memory. Built on the Nitro hypervisor, this x86_64 instance lacks local storage and GPU accelerators, relying on a 5 Gbps baseline network bandwidth. Performance benchmarks reveal a contrast between weak single-core stress-ng results and average multi-core capabilities, such as a Passmark CPU score of 19648.81. Large-block memory bandwidth is a notable bottleneck, falling into the bottom 25 percent, whereas cached small-block reads perform at average levels. The instance is suited for multi-threaded workloads, including software compilation, static web serving, and database operations, offering a qualitative balance of dedicated compute resources without the added cost of bundled local storage.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      0.69Score
      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 1,918,343 ops/sec 0.68 50.00% 50.00% -18.00%
      Redis RPS (pipeline=16, SET) 8,735,480 ops/sec 11,704,734 ops/sec 0.72 20.00% 20.00% -6.40%
      PassMark Memory Mark (composite) 2,616 2,416 1.1 10.00% 10.00% +0.96%
      Memory bandwidth (read, 16 MB ~ L3) 37,620 MB/sec 108,420 MB/sec 0.35 10.00% 10.00% -10.00%
      PassMark single-thread CPU 2,133 Mops/s 2,365 Mops/s 0.88 10.00% 10.00% -1.30%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 1,339

      Geekbench Multi-Core

      Score: 7,998

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 19,649
      Compression
      		 241,366
      Encryption
      		 17,092
      Extended Instructions
      		 14,801
      Floating Point Maths
      		 32,226
      Integer Maths
      		 53,973
      Physics
      		 1,790
      Prime Numbers
      		 86
      Single Threaded
      		 2,133
      String Sorting
      		 33,308

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2,616
      Database Operations
      		 5,712
      Memory Latency
      		 51
      Memory Read Cached
      		 24,711
      Memory Read Uncached
      		 12,794
      Memory Write
      		 13,615

      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
      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