c8a.8xlarge by Amazon Web Services

c8a.8xlarge is a Compute optimized [AMD processors] Gen8 8xlarge server offered by Amazon Web Services with 32 vCPUs, 64 GiB of memory and 0 GB of storage. The pricing starts at 0.2273 USD per hour.
32 vCPU
64 GiB Memory
Spare SCore
120,279
(All-cores)
3,774
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
c8a.8xlarge
Description
Compute optimized [AMD processors] Gen8 8xlarge
Family
c8a
Hw Virt
Average Time To Start
7
Status
active
Observed At
2026-09-14T12:02:12.266930

Availability

REGION / IDSPOTONDEMAND
Ohio (US) / us-east-2
0.4665 USD/h 1.7243 USD/h
Oregon (US) / us-west-2
0.7179 USD/h 1.7243 USD/h
Northern Virgina (US) / us-east-1
0.77896 USD/h 1.7243 USD/h
Aragón (ES) / eu-south-2
0.378967 USD/h 1.8498 USD/h
Dublin (IE) / eu-west-1
0.8549 USD/h 1.8501 USD/h
Frankfurt (DE) / eu-central-1
0.6965 USD/h 1.9678 USD/h
Tokyo (JP) / ap-northeast-1
0.782133 USD/h 2.1706 USD/h

Processor

vCPUs
32
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
32
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
2 MiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
1 MiB
CPU L2 Cache
1 MiB
CPU L2 Cache Total
32 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, 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
31.9
Scalability
99.69

System Resources and Accelerators

MEMORY
Memory Amount
64 GiB
Memory Amount Actual
64 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
      15 Gbps
      Network Speed Max
      15 Gbps
      Network Storage Speed Baseline
      10 Gbps
      Network Storage Speed Max
      10 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      CPU and System Topology

      Server Description

      A high-frequency, compute-optimized instance featuring dedicated AMD EPYC cores and DDR5 memory for high-throughput, CPU-bound workloads.

      Compute OptimizedGeneral Purpose

      Amazon Web Services c8a.8xlarge is a compute-optimized instance featuring 32 dedicated physical cores powered by an AMD EPYC 9R45 processor running at 4.5 GHz. Built on the x86_64 architecture and managed by the Nitro hypervisor, it includes 64.0 GB of DDR5 memory at 6 GHz but lacks local storage and GPU accelerators. The instance delivers top-tier performance, ranking in the top 10% for single-core stress-ng, Geekbench, and database operations, alongside strong top 25% multi-core and memory bandwidth capabilities. With a 2.0 GB memory-per-core ratio, it represents a high-density compute profile optimized for CPU-bound workloads. It is highly suited for software compilation, web serving, database tasks, and medium-scale LLM inference.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      4.23Score
      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) 11,865,395 ops/sec 1,917,397 ops/sec 6.19 50.00% 50.00% +149.00%
      Redis RPS (pipeline=16, SET) 78,728,018 ops/sec 11,681,410 ops/sec 6.74 20.00% 20.00% +46.50%
      PassMark Memory Mark (composite) 2,830 2,418 1.17 10.00% 10.00% +1.58%
      Memory bandwidth (read, 16 MB ~ L3) 253,035 MB/sec 108,140 MB/sec 2.34 10.00% 10.00% +8.87%
      PassMark single-thread CPU 3,828 Mops/s 2,365 Mops/s 1.62 10.00% 10.00% +4.94%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 2,631

      Geekbench Multi-Core

      Score: 24,632

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 80094
      Compression
      		 1056892
      Encryption
      		 50642
      Extended Instructions
      		 96811
      Floating Point Maths
      		 243309
      Integer Maths
      		 243621
      Physics
      		 11697
      Prime Numbers
      		 888
      Single Threaded
      		 3828
      String Sorting
      		 144046

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2830
      Database Operations
      		 41207
      Memory Latency
      		 83
      Memory Read Cached
      		 33847
      Memory Read Uncached
      		 32663
      Memory Write
      		 32783

      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

      PostgreSQL heavy read-only throughput

      Alternatives

      Servers of the Same Family

      INSTANCEvCPUsMEMORYGPUs
      c8a.medium 12 GiB0
      c8a.large 24 GiB0
      c8a.xlarge 48 GiB0
      c8a.2xlarge 816 GiB0
      c8a.4xlarge 1632 GiB0
      c8a.12xlarge 4896 GiB0
      c8a.16xlarge 64128 GiB0

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      c8a.8xlarge FAQs