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c8a.16xlarge by Amazon Web Services

c8a.16xlarge is a Compute optimized [AMD processors] Gen8 16xlarge server offered by Amazon Web Services with 64 vCPUs, 128 GiB of memory and 0 GB of storage. The pricing starts at 0.37 USD per hour.
64 vCPU
128 GiB Memory
Spare SCore
238556
(All-cores)
3753
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
c8a.16xlarge
Description
Compute optimized [AMD processors] Gen8 16xlarge
Family
c8a
Hw Virt
Status
active
Observed At
2026-07-31T15:15:46.644902

Availability

REGION / IDSPOTONDEMAND
Oregon (US) / us-west-2
1.258225 USD/h 3.4486 USD/h
Ohio (US) / us-east-2
1.085167 USD/h 3.4486 USD/h
Northern Virgina (US) / us-east-1
1.31016 USD/h 3.4486 USD/h
Aragón (ES) / eu-south-2
0.705333 USD/h 3.6995 USD/h
Dublin (IE) / eu-west-1
1.73755 USD/h 3.7002 USD/h
Frankfurt (DE) / eu-central-1
1.098367 USD/h 3.9357 USD/h
Tokyo (JP) / ap-northeast-1
1.9722 USD/h 4.3411 USD/h

Processor

vCPUs
64
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
64
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
3 MiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
2 MiB
CPU L2 Cache
1 MiB
CPU L2 Cache Total
64 MiB
CPU L3 Cache
32 MiB
CPU L3 Cache Total
256 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
63.6
Scalability
99.38

System Resources and Accelerators

MEMORY
Memory Amount
128 GiB
Memory Amount Actual
128 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
      30 Gbps
      Network Speed Max
      30 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-frequency, compute-dense server featuring dedicated AMD EPYC processors and DDR5 memory for demanding CPU-bound workloads.

      Compute Optimized

      Amazon Web Services c8a.16xlarge is a compute-optimized instance featuring 64 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 128.0 GB of DDR5 memory at 6 GHz, providing 2.0 GB of RAM per core. The instance lacks local storage and dedicated GPUs, relying instead on network-attached storage and a 30 Gbps baseline network interface. Benchmark data indicates top-tier performance in single-core and multi-core CPU execution, memory bandwidth, and cryptographic operations. It excels in compute-heavy tasks such as software compilation, static web serving, database operations, and CPU-based LLM inference. This hardware profile offers high qualitative cost efficiency for workloads requiring dense, high-frequency processing power without the overhead of excess memory or local storage.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      6.67Score
      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) 20,599,668 ops/sec 1,896,415 ops/sec 10.9 50.00% 50.00% +230.00%
      Redis RPS (pipeline=16, SET) 130,981,300 ops/sec 11,539,523 ops/sec 11.4 20.00% 20.00% +62.70%
      PassMark Memory Mark (composite) 2,846 2,411 1.18 10.00% 10.00% +1.67%
      Memory bandwidth (read, 16 MB ~ L3) 502,895 MB/sec 107,368 MB/sec 4.68 10.00% 10.00% +16.70%
      PassMark single-thread CPU 3,819 Mops/s 2,363 Mops/s 1.62 10.00% 10.00% +4.94%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 2,825

      Geekbench Multi-Core

      Score: 30,892

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 118499
      Compression
      		 1830213
      Encryption
      		 99027
      Extended Instructions
      		 158773
      Floating Point Maths
      		 475378
      Integer Maths
      		 483770
      Physics
      		 21606
      Prime Numbers
      		 1612
      Single Threaded
      		 3819
      String Sorting
      		 249758

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2846
      Database Operations
      		 40624
      Memory Latency
      		 85
      Memory Read Cached
      		 33854
      Memory Read Uncached
      		 32481
      Memory Write
      		 32641

      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.4xlarge 1632 GiB0
      c8a.8xlarge 3264 GiB0
      c8a.12xlarge 4896 GiB0

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      c8a.16xlarge FAQs