c6a.4xlarge by Amazon Web Services

c6a.4xlarge is a Compute optimized [AMD processors] Gen6 4xlarge server offered by Amazon Web Services with 16 vCPUs, 32 GiB of memory and 0 GB of storage. The pricing starts at 0.0433 USD per hour.
16 vCPU
32 GiB Memory
Spare SCore
23,947
(All-cores)
2,993
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
c6a.4xlarge
Description
Compute optimized [AMD processors] Gen6 4xlarge
Family
c6a
Hw Virt
Status
active
Observed At
2026-10-27T00:00:31.262567

Availability

REGION / IDSPOTONDEMAND
Hyderabad (IN) / ap-south-2
0.072267 USD/h 0.374 USD/h
Mumbai (IN) / ap-south-1
0.175233 USD/h 0.374 USD/h
Ohio (US) / us-east-2
0.2172 USD/h 0.612 USD/h
Oregon (US) / us-west-2
0.255475 USD/h 0.612 USD/h
Northern Virgina (US) / us-east-1
0.26774 USD/h 0.612 USD/h
Dublin (IE) / eu-west-1
0.3634 USD/h 0.6566 USD/h
Quebec (CA) / ca-central-1
0.282233 USD/h 0.6696 USD/h
Frankfurt (DE) / eu-central-1
0.350667 USD/h 0.6984 USD/h
Singapore (SG) / ap-southeast-1
0.430833 USD/h 0.7056 USD/h
London (GB) / eu-west-2
0.2851 USD/h 0.7272 USD/h
California (US) / us-west-1
0.25895 USD/h 0.7632 USD/h
Tokyo (JP) / ap-northeast-1
0.3576 USD/h 0.7704 USD/h
Hong Kong (HK) / ap-east-1
0.2496 USD/h 0.7776 USD/h
Sydney (AU) / ap-southeast-2
0.378367 USD/h 0.7992 USD/h
Sao Paulo (BR) / sa-east-1
0.1369 USD/h 0.9432 USD/h

Processor

vCPUs
16
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
8
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
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
32 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, 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
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
      6.25 Gbps
      Network Speed Max
      12.5 Gbps
      Network Storage Speed Baseline
      5 Gbps
      Network Storage Speed Max
      10 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      Server Description

      A dedicated compute-optimized instance featuring sixteen vCPUs, balanced single-core processing, and a lean memory-to-core ratio for compute-bound workloads.

      Compute OptimizedGeneral Purpose

      Amazon Web Services c6a.4xlarge is an x86_64 compute-optimized server instance featuring an AMD EPYC 7R13 processor with 16 dedicated vCPUs, 8 physical cores, and a 3.6 GHz clock speed. It is configured with 32.0 GB of DDR4 memory, providing 2.0 GB of RAM per core, and runs on the Nitro hypervisor. The instance does not include local storage or GPUs, and it delivers a baseline network bandwidth of 6 Gbps. Benchmark data shows strong single-core CPU performance and strong text generation speeds for small language models, though multi-core execution and database operations remain average. A key tradeoff is its memory subsystem, where uncached large-block read and write bandwidth benchmarks are weak. This instance is suited for compute-bound workloads, web serving, software compilation, and small-scale model inference.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      0.76Score
      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) 1,442,589 ops/sec 1,918,343 ops/sec 0.74 50.00% 50.00% -14.00%
      Redis RPS (pipeline=16, SET) 9,967,508 ops/sec 11,704,734 ops/sec 0.83 20.00% 20.00% -3.70%
      PassMark Memory Mark (composite) 2,581 2,416 1.1 10.00% 10.00% +0.96%
      Memory bandwidth (read, 16 MB ~ L3) 40,635 MB/sec 108,420 MB/sec 0.37 10.00% 10.00% -9.50%
      PassMark single-thread CPU 2,645 Mops/s 2,365 Mops/s 1.1 10.00% 10.00% +0.96%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 1,676

      Geekbench Multi-Core

      Score: 9,683

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 23,584
      Compression
      		 280,934
      Encryption
      		 18,954
      Extended Instructions
      		 16,526
      Floating Point Maths
      		 40,959
      Integer Maths
      		 73,641
      Physics
      		 2,010
      Prime Numbers
      		 100
      Single Threaded
      		 2,645
      String Sorting
      		 37,423

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2,581
      Database Operations
      		 7,169
      Memory Latency
      		 64
      Memory Read Cached
      		 26,354
      Memory Read Uncached
      		 17,477
      Memory Write
      		 16,813

      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.8xlarge 3264 GiB0
      c6a.12xlarge 4896 GiB0
      c6a.16xlarge 64128 GiB0
      c6a.24xlarge 96192 GiB0

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      c6a.4xlarge FAQs