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c5a.16xlarge by Amazon Web Services

c5a.16xlarge is a Compute optimized [AMD processors] Gen5 16xlarge server offered by Amazon Web Services with 64 vCPUs, 128 GiB of memory and 0 GB of storage. The pricing starts at 0.3454 USD per hour.
64 vCPU
128 GiB Memory
Spare SCore
24580
(All-cores)
766
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
c5a.16xlarge
Description
Compute optimized [AMD processors] Gen5 16xlarge
Family
c5a
Hw Virt
Status
active
Observed At
2026-08-05T00:14:21.838197

Availability

REGION / IDSPOTONDEMAND
Mumbai (IN) / ap-south-1
0.6185 USD/h 1.504 USD/h
Ohio (US) / us-east-2
0.786 USD/h 2.464 USD/h
Oregon (US) / us-west-2
0.99695 USD/h 2.464 USD/h
Northern Virgina (US) / us-east-1
1.15116 USD/h 2.464 USD/h
Stockholm (SE) / eu-north-1
0.613333 USD/h 2.624 USD/h
Quebec (CA) / ca-central-1
0.839167 USD/h 2.688 USD/h
Seoul (KR) / ap-northeast-2
0.945767 USD/h 2.752 USD/h
Dublin (IE) / eu-west-1
1.474233 USD/h 2.752 USD/h
Frankfurt (DE) / eu-central-1
1.1142 USD/h 2.784 USD/h
Singapore (SG) / ap-southeast-1
0.9018 USD/h 2.816 USD/h
Milan (IT) / eu-south-1
0.5131 USD/h 2.912 USD/h
London (GB) / eu-west-2
1.149567 USD/h 2.912 USD/h
Paris (FR) / eu-west-3
1.05565 USD/h 2.912 USD/h
California (US) / us-west-1
1.0498 USD/h 3.04 USD/h
Tokyo (JP) / ap-northeast-1
1.2291 USD/h 3.072 USD/h
Hong Kong (HK) / ap-east-1
2.823967 USD/h 3.104 USD/h
Sydney (AU) / ap-southeast-2
1.143433 USD/h 3.2 USD/h
Cape Town (ZA) / af-south-1
0.745467 USD/h 3.296 USD/h
Sao Paulo (BR) / sa-east-1
0.750833 USD/h 3.776 USD/h

Processor

vCPUs
64
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
32
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
1 MiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
1 MiB
CPU L2 Cache
512 KiB
CPU L2 Cache Total
16 MiB
CPU L3 Cache
16 MiB
CPU L3 Cache Total
128 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
32.1
Scalability
100.31

System Resources and Accelerators

MEMORY
Memory Amount
128 GiB
Memory Amount Actual
128 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
      20 Gbps
      Network Speed Max
      20 Gbps
      Network Storage Speed Baseline
      6.3 Gbps
      Network Storage Speed Max
      6.3 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      Server Description

      A dedicated 64-vCPU compute-optimized platform featuring AMD EPYC processors and DDR4 memory for highly parallelized, multi-threaded workloads.

      Compute OptimizedGeneral Purpose

      Amazon Web Services c5a.16xlarge is an x86_64 compute-optimized instance powered by an AMD EPYC 7R32 processor running at 3.3 GHz. It features 64 vCPUs (32 physical cores), 128.0 GB of DDR4 memory, and a 20 Gbps baseline network bandwidth, with no bundled local storage or GPU accelerators. Operating on the Nitro hypervisor, the instance exhibits average multi-core CPU and memory bandwidth performance, with strong results in Passmark CPU, encryption, and ray tracing benchmarks, though its single-core performance is relatively weak. This hardware profile is qualitatively cost-efficient for high-density, multi-threaded CPU workloads. It is well-suited for software compilation, cryptography, ray tracing, and general-purpose multi-threaded batch processing.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      2.1Score
      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) 5,281,458 ops/sec 1,910,660 ops/sec 2.76 50.00% 50.00% +66.10%
      Redis RPS (pipeline=16, SET) 34,578,134 ops/sec 11,608,287 ops/sec 2.98 20.00% 20.00% +24.40%
      PassMark Memory Mark (composite) 2,855 2,416 1.18 10.00% 10.00% +1.67%
      Memory bandwidth (read, 16 MB ~ L3) 118,140 MB/sec 107,896 MB/sec 1.09 10.00% 10.00% +0.87%
      PassMark single-thread CPU 2,133 Mops/s 2,364 Mops/s 0.902 10.00% 10.00% -1.03%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 1,344

      Geekbench Multi-Core

      Score: 13,908

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 55843
      Compression
      		 946394
      Encryption
      		 68247
      Extended Instructions
      		 58845
      Floating Point Maths
      		 128966
      Integer Maths
      		 216132
      Physics
      		 5443
      Prime Numbers
      		 302
      Single Threaded
      		 2133
      String Sorting
      		 127797

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2855
      Database Operations
      		 21377
      Memory Latency
      		 52
      Memory Read Cached
      		 24353
      Memory Read Uncached
      		 12218
      Memory Write
      		 13164

      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.12xlarge 4896 GiB0
      c5a.24xlarge 96192 GiB0

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      c5a.16xlarge FAQs