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 0.1496 USD per hour.
64 vCPU
128 GiB Memory
Spare SCore
95,672
(All-cores)
2,992
(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
2026-11-11T07:51:29.365829

Availability

REGION / IDSPOTONDEMAND
Hyderabad (IN) / ap-south-2
0.1496 USD/h 1.496 USD/h
Mumbai (IN) / ap-south-1
0.631367 USD/h 1.496 USD/h
Ohio (US) / us-east-2
0.721533 USD/h 2.448 USD/h
Northern Virgina (US) / us-east-1
0.85472 USD/h 2.448 USD/h
Oregon (US) / us-west-2
1.129075 USD/h 2.448 USD/h
Dublin (IE) / eu-west-1
1.3594 USD/h 2.6266 USD/h
Quebec (CA) / ca-central-1
0.774067 USD/h 2.6784 USD/h
Frankfurt (DE) / eu-central-1
1.298167 USD/h 2.7936 USD/h
Singapore (SG) / ap-southeast-1
1.193267 USD/h 2.8224 USD/h
London (GB) / eu-west-2
1.1823 USD/h 2.9088 USD/h
California (US) / us-west-1
1.11695 USD/h 3.0528 USD/h
Tokyo (JP) / ap-northeast-1
1.293167 USD/h 3.0816 USD/h
Hong Kong (HK) / ap-east-1
0.69735 USD/h 3.1104 USD/h
Sydney (AU) / ap-southeast-2
1.457667 USD/h 3.1968 USD/h
Sao Paulo (BR) / sa-east-1
0.576867 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
50

System Resources and Accelerators

MEMORY
Memory Amount
128 GiB
Memory Amount Actual
128 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
      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

      Compute-optimized 64-vCPU AMD EPYC server featuring 128 GB DDR4 RAM, 25 Gbps networking, and top-tier multi-threaded processing efficiency.

      Compute Optimized

      Amazon Web Services c6a.16xlarge is a compute-optimized instance driven by a dedicated 32-core, 64-vCPU AMD EPYC 7R13 processor operating at 3.6 GHz on x86_64 architecture. Managed by the AWS Nitro System, it provides 128 GB of 3 GHz DDR4 RAM with a 1:2 memory-to-vCPU ratio, alongside a 25 Gbps network interface and zero local storage. Benchmarks place its multi-core CPU capacity in the top 25%, excelling in stress-ng tests, PassMark encryption, Redis SET operations reaching 67.6 million per second, and Clang software compilation. Cached small-block memory reads achieve top-quartile speeds, though uncached large-block transfers remain average. Without bundled local disk space or GPU hardware, this instance yields high resource density and processing efficiency for compute-heavy applications. It is suited for software build pipelines, batch processing jobs, web serving, in-memory caching, and CPU-based data transformations.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      2.3Score
      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 1,926,573 ops/sec 2.9 50.00% 50.00% +70.00%
      Redis RPS (pipeline=16, SET) 39,564,360 ops/sec 11,810,473 ops/sec 3.3 20.00% 20.00% +27.00%
      PassMark Memory Mark (composite) 2,886 2,406 1.2 10.00% 10.00% +1.80%
      Memory bandwidth (read, 16 MB ~ L3) 126,291 MB/sec 108,674 MB/sec 1.2 10.00% 10.00% +1.80%
      PassMark single-thread CPU 2,621 Mops/s 2,365 Mops/s 1.1 10.00% 10.00% +0.96%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 1,665

      Geekbench Multi-Core

      Score: 15,953

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 67,170
      Compression
      		 1,116,036
      Encryption
      		 75,818
      Extended Instructions
      		 60,752
      Floating Point Maths
      		 161,548
      Integer Maths
      		 294,370
      Physics
      		 6,481
      Prime Numbers
      		 371
      Single Threaded
      		 2,621
      String Sorting
      		 144,603

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2,886
      Database Operations
      		 26,734
      Memory Latency
      		 63
      Memory Read Cached
      		 26,419
      Memory Read Uncached
      		 17,662
      Memory Write
      		 17,159

      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
      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