logo

c8a.4xlarge by Amazon Web Services

c8a.4xlarge is a Compute optimized [AMD processors] Gen8 4xlarge server offered by Amazon Web Services with 16 vCPUs, 32 GiB of memory and 0 GB of storage. The pricing starts at 0.1936 USD per hour.
16 vCPU
32 GiB Memory
Spare SCore
59719
(All-cores)
3777
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
c8a.4xlarge
Description
Compute optimized [AMD processors] Gen8 4xlarge
Family
c8a
Hw Virt
Status
active
Observed At
2026-07-21T22:13:14.058079

Availability

REGION / IDSPOTONDEMAND
Ohio (US) / us-east-2
0.2965 USD/h 0.8622 USD/h
Oregon (US) / us-west-2
0.377075 USD/h 0.8622 USD/h
Northern Virgina (US) / us-east-1
0.37834 USD/h 0.8622 USD/h
Aragón (ES) / eu-south-2
0.199867 USD/h 0.9249 USD/h
Dublin (IE) / eu-west-1
0.46355 USD/h 0.925 USD/h
Frankfurt (DE) / eu-central-1
0.317267 USD/h 0.9839 USD/h
Tokyo (JP) / ap-northeast-1
0.365767 USD/h 1.0853 USD/h

Processor

vCPUs
16
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
16
CPU Speed
4.5 GHz
CPU Architecture
x86_64
CPU Manufacturer
AMD
CPU Family
EPYC
CPU Model
9R45
CPU L1D Cache
48 KiB
CPU L1D Cache Total
768 KiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
512 KiB
CPU L2 Cache
1 MiB
CPU L2 Cache Total
16 MiB
CPU L3 Cache
32 MiB
CPU L3 Cache Total
64 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, xtopology, nonstop_tsc, cpuid, extd_apicid, aperfmperf, tsc_known_freq, pni, pclmulqdq, monitor, 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, perfctr_core, ssbd, perfmon_v2, ibrs, ibpb, stibp, ibrs_enhanced, vmmcall, fsgsbase, tsc_adjust, bmi1, avx2, smep, bmi2, erms, invpcid, avx512f, avx512dq, rdseed, adx, smap, avx512ifma, clflushopt, clwb, avx512cd, sha_ni, avx512bw, avx512vl, xsaveopt, xsavec, xgetbv1, xsaves, avx_vnni, avx512_bf16, clzero, xsaveerptr, rdpru, wbnoinvd, arat, avx512vbmi, pku, ospke, avx512_vbmi2, gfni, vaes, vpclmulqdq, avx512_vnni, avx512_bitalg, avx512_vpopcntdq, rdpid, movdiri, movdir64b, fsrm, avx512_vp2intersect, flush_l1d
Ecpus
15.8
Scalability
98.75

System Resources and Accelerators

MEMORY
Memory Amount
32 GiB
Memory Amount Actual
32 GiB
Memory Generation
DDR5
Memory Speed
6400 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
      7.5 Gbps
      Network Speed Max
      15 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 compute-optimized x86 server featuring dedicated AMD EPYC cores, high-speed DDR5 memory, and top-tier single-core benchmark performance.

      Compute OptimizedGeneral Purpose

      Amazon Web Services c8a.4xlarge is a compute-optimized server featuring 16 dedicated physical cores and 16 vCPUs powered by an AMD EPYC 9R45 processor running at 4.5 GHz. Built on the Nitro hypervisor, it includes 32.0 GB of DDR5 memory at 6 GHz, providing 2.0 GB of RAM per core. The instance lacks local storage and GPU hardware, relying on an 8 Gbps baseline network bandwidth. In benchmark testing, the server excels in single-core execution, placing in the top 10% for stress-ng and Geekbench single-core tests, as well as single-threaded compression. Multi-core performance and memory bandwidth benchmarks generally fall into the average tier. This hardware profile is optimized for compute-heavy applications, web serving, and lightweight machine learning inference where high clock speeds and dedicated CPU resources are required, presenting a balanced cost-to-compute ratio for non-storage-intensive workloads.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      2.44Score
      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) 5,892,940 ops/sec 1,896,415 ops/sec 3.11 50.00% 50.00% +76.40%
      Redis RPS (pipeline=16, SET) 39,716,563 ops/sec 11,539,523 ops/sec 3.44 20.00% 20.00% +28.00%
      PassMark Memory Mark (composite) 2,741 2,411 1.14 10.00% 10.00% +1.32%
      Memory bandwidth (read, 16 MB ~ L3) 127,735 MB/sec 107,368 MB/sec 1.19 10.00% 10.00% +1.75%
      PassMark single-thread CPU 3,827 Mops/s 2,363 Mops/s 1.62 10.00% 10.00% +4.94%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 2,803

      Geekbench Multi-Core

      Score: 21,550

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		47007
      Compression
      		528098
      Encryption
      		25293
      Extended Instructions
      		49548
      Floating Point Maths
      		121549
      Integer Maths
      		121784
      Physics
      		6072
      Prime Numbers
      		445
      Single Threaded
      		3827
      String Sorting
      		73761

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		2741
      Database Operations
      		20831
      Memory Latency
      		82
      Memory Read Cached
      		33959
      Memory Read Uncached
      		32545
      Memory Write
      		32566

      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
      c8a.medium 12 GiB0
      c8a.large 24 GiB0
      c8a.xlarge 48 GiB0
      c8a.2xlarge 816 GiB0
      c8a.8xlarge 3264 GiB0
      c8a.12xlarge 4896 GiB0
      c8a.16xlarge 64128 GiB0

      Similar Servers

      INSTANCEVENDORvCPUsMEMORYGPUs

      c8a.4xlarge FAQs