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c6a.16xlarge by Amazon Web Services

c6a.16xlarge is a Compute optimized [AMD processors] Gen6 16xlarge server offered by Amazon Web Services with 64 vCPUs, 128 GiB of memory and 0 GB of storage. The pricing starts at 0.4127 USD per hour.
64 vCPU
128 GiB Memory
Spare SCore
95672
(All-cores)
2992
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
c6a.16xlarge
Description
Compute optimized [AMD processors] Gen6 16xlarge
Family
c6a
Hw Virt
Status
active
Observed At
2026-08-13T10:37:32.013626

Availability

REGION / IDSPOTONDEMAND
Mumbai (IN) / ap-south-1
0.428833 USD/h 1.496 USD/h
Hyderabad (IN) / ap-south-2
0.5221 USD/h 1.496 USD/h
Ohio (US) / us-east-2
0.7853 USD/h 2.448 USD/h
Oregon (US) / us-west-2
0.9335 USD/h 2.448 USD/h
Northern Virgina (US) / us-east-1
1.05522 USD/h 2.448 USD/h
Dublin (IE) / eu-west-1
1.408067 USD/h 2.6266 USD/h
Quebec (CA) / ca-central-1
0.8695 USD/h 2.6784 USD/h
Frankfurt (DE) / eu-central-1
1.3675 USD/h 2.7936 USD/h
Singapore (SG) / ap-southeast-1
1.1616 USD/h 2.8224 USD/h
London (GB) / eu-west-2
1.2422 USD/h 2.9088 USD/h
California (US) / us-west-1
1.05555 USD/h 3.0528 USD/h
Tokyo (JP) / ap-northeast-1
1.242067 USD/h 3.0816 USD/h
Hong Kong (HK) / ap-east-1
0.72295 USD/h 3.1104 USD/h
Sydney (AU) / ap-southeast-2
1.540133 USD/h 3.1968 USD/h
Sao Paulo (BR) / sa-east-1
0.685333 USD/h 3.7728 USD/h

Processor

vCPUs
64
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
32
CPU Speed
3.6 GHz
CPU Architecture
x86_64
CPU Manufacturer
AMD
CPU Family
EPYC
CPU Model
7R13
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
32 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, pcid, sse4_1, sse4_2, x2apic, 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, invpcid, rdseed, adx, smap, clflushopt, clwb, sha_ni, xsaveopt, xsavec, xgetbv1, clzero, xsaveerptr, rdpru, wbnoinvd, arat, npt, nrip_save, vaes, vpclmulqdq, rdpid
Ecpus
32
Scalability
100

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
      25 Gbps
      Network Speed Max
      25 Gbps
      Network Storage Speed Baseline
      20 Gbps
      Network Storage Speed Max
      20 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      Server Description

      A high-core-density, compute-optimized virtual server designed for processor-intensive workloads, software compilation, and high-throughput database operations.

      Compute OptimizedGeneral Purpose

      Amazon Web Services c6a.16xlarge is a compute-optimized server featuring a dedicated AMD EPYC 7R13 processor with 64 vCPUs running at 3.6 GHz on the Nitro hypervisor. It is configured with 128.0 GB of DDR4 memory, providing 2.0 GB of RAM per core, and delivers a baseline network bandwidth of 25 Gbps. This instance does not include local storage or GPUs. Performance benchmarks show strong multi-core CPU capabilities, with a stress-ng multi-core score of 95,671.57 and high efficiency in software compilation, database operations, and Redis SET operations. However, uncached large-block memory bandwidth remains average. The c6a.16xlarge is highly suited for compute-heavy workloads such as software compilation, high-throughput web serving, and small-scale language model inference where local storage is not a primary requirement.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      2.28Score
      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) 5,592,520 ops/sec 1,910,660 ops/sec 2.93 50.00% 50.00% +71.20%
      Redis RPS (pipeline=16, SET) 39,564,360 ops/sec 11,608,287 ops/sec 3.41 20.00% 20.00% +27.80%
      PassMark Memory Mark (composite) 2,886 2,416 1.19 10.00% 10.00% +1.75%
      Memory bandwidth (read, 16 MB ~ L3) 126,291 MB/sec 107,896 MB/sec 1.17 10.00% 10.00% +1.58%
      PassMark single-thread CPU 2,621 Mops/s 2,364 Mops/s 1.11 10.00% 10.00% +1.05%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 1,665

      Geekbench Multi-Core

      Score: 15,953

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 67170
      Compression
      		 1116036
      Encryption
      		 75818
      Extended Instructions
      		 60752
      Floating Point Maths
      		 161548
      Integer Maths
      		 294370
      Physics
      		 6481
      Prime Numbers
      		 371
      Single Threaded
      		 2621
      String Sorting
      		 144603

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2886
      Database Operations
      		 26734
      Memory Latency
      		 63
      Memory Read Cached
      		 26419
      Memory Read Uncached
      		 17662
      Memory Write
      		 17159

      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
      c6a.large 24 GiB0
      c6a.xlarge 48 GiB0
      c6a.2xlarge 816 GiB0
      c6a.4xlarge 1632 GiB0
      c6a.8xlarge 3264 GiB0
      c6a.12xlarge 4896 GiB0
      c6a.24xlarge 96192 GiB0

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      c6a.16xlarge FAQs