c8a.2xlarge by Amazon Web Services

c8a.2xlarge is a Compute optimized [AMD processors] Gen8 2xlarge server offered by Amazon Web Services with 8 vCPUs, 16 GiB of memory and 0 GB of storage. The pricing starts at 0.0707 USD per hour.
8 vCPU
16 GiB Memory
Spare SCore
30,083
(All-cores)
3,773
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
c8a.2xlarge
Description
Compute optimized [AMD processors] Gen8 2xlarge
Family
c8a
Hw Virt
Average Time To Start
6.33
Status
active
Observed At
2026-10-30T04:38:10.391258

Availability

REGION / IDSPOTONDEMAND
Ohio (US) / us-east-2
0.1181 USD/h 0.4311 USD/h
Oregon (US) / us-west-2
0.1727 USD/h 0.4311 USD/h
Northern Virgina (US) / us-east-1
0.16638 USD/h 0.4311 USD/h
Aragón (ES) / eu-south-2
0.073867 USD/h 0.4624 USD/h
Dublin (IE) / eu-west-1
0.1977 USD/h 0.4625 USD/h
Frankfurt (DE) / eu-central-1
0.199367 USD/h 0.492 USD/h
Tokyo (JP) / ap-northeast-1
0.205267 USD/h 0.5426 USD/h

Processor

vCPUs
8
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
8
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
384 KiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
256 KiB
CPU L2 Cache
1 MiB
CPU L2 Cache Total
8 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, 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
8
Scalability
100

System Resources and Accelerators

MEMORY
Memory Amount
16 GiB
Memory Amount Actual
16 GiB
Memory Generation
DDR5
Memory Speed
6400 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
      3.75 Gbps
      Network Speed Max
      15 Gbps
      Network Storage Speed Baseline
      2.5 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

      An 8-core AMD EPYC compute-optimized server with high-speed DDR5 memory, delivering top-tier single-core performance for compute-intensive workloads.

      Compute Optimized

      Amazon Web Services c8a.2xlarge is a compute-optimized instance featuring an 8-core AMD EPYC 9R45 processor running at 4.5 GHz with 16.0 GB of DDR5 memory. Operating on the AWS Nitro hypervisor, this x86_64 server provides dedicated CPU allocation with 1.0 thread per core and a 4 Gbps baseline network bandwidth, though it lacks local storage and GPU accelerators. Benchmark data highlights top-tier single-core CPU and text processing capabilities, alongside strong performance in small-model LLM inference. Multi-core execution and memory bandwidth fall into the average tier. Given its high clock speed and 1:2 memory-to-core ratio, the c8a.2xlarge is qualitatively cost-efficient for compute-heavy, single-threaded tasks, software compilation, and lightweight web serving workloads.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      1.4Score
      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) 3,004,992 ops/sec 1,919,289 ops/sec 1.6 50.00% 50.00% +26.00%
      Redis RPS (pipeline=16, SET) 19,643,306 ops/sec 11,728,058 ops/sec 1.7 20.00% 20.00% +11.00%
      PassMark Memory Mark (composite) 2,195 2,416 0.92 10.00% 10.00% -0.83%
      Memory bandwidth (read, 16 MB ~ L3) 62,481 MB/sec 108,466 MB/sec 0.56 10.00% 10.00% -5.60%
      PassMark single-thread CPU 3,824 Mops/s 2,365 Mops/s 1.6 10.00% 10.00% +4.80%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 2,803

      Geekbench Multi-Core

      Score: 13,985

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 25,609
      Compression
      		 263,956
      Encryption
      		 12,686
      Extended Instructions
      		 24,372
      Floating Point Maths
      		 61,041
      Integer Maths
      		 60,903
      Physics
      		 3,076
      Prime Numbers
      		 220
      Single Threaded
      		 3,824
      String Sorting
      		 36,385

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2,195
      Database Operations
      		 10,388
      Memory Latency
      		 87
      Memory Read Cached
      		 33,844
      Memory Read Uncached
      		 32,463
      Memory Write
      		 32,808

      Stress-ng Stressors

      CPU integerSingleMultiScaling
      atomic
      		 491.34 480.72 0.98×
      bitops
      		 232,686 1,844,221 7.93×
      branch
      		 185,302 1,473,517 7.95×
      funccall
      		 908.53 7,173 7.90×
      funcret
      		 27,319 214,064 7.84×
      hash
      		 218,795 1,734,702 7.93×
      intmath
      		 80,574 638,422 7.92×
      nop
      		 433,144 3,439,786 7.94×
      prime
      		 621,618 4,915,094 7.91×
      rotate
      		 142,965 1,136,607 7.95×
      str
      		 1,606,075 12,581,045 7.83×
      wcs
      		 1,057,833 8,574,298 8.11×
      CryptographySingleMultiScaling
      crypt
      		 5,399 42,935 7.95×
      CompressionSingleMultiScaling
      jpeg
      		 1,245 9,825 7.89×
      zlib
      		 88.63 648.7 7.32×
      HypervisorSingleMultiScaling
      clock
      		 51,745 277,502 5.36×
      clone
      		 895.97 3,666 4.09×
      context
      		 9,280 73,420 7.91×
      cpu-sched
      		 60.57 502.45 8.30×
      eventfd
      		 232,565 2,299,336 9.89×
      fault
      		 45,685 288,198 6.31×
      fork
      		 12,907 101,230 7.84×
      getrandom
      		 101,348 798,129 7.88×
      hrtimers
      		 156,302 2,152,637 13.77×
      mprotect
      		 2,708,468 6,370,214 2.35×
      mtx
      		 28,739,357 681,131,242 23.70×
      munmap
      		 9,716 75,767 7.80×
      null
      		 1,564,534 12,037,590 7.69×
      pipe
      		 3,049,721 16,284,297 5.34×
      priv-instr
      		 1,620,034 12,531,267 7.74×
      resched
      		 8,400,018 3,103,730 0.37×
      switch
      		 364,990 5,148,387 14.11×
      timermix
      		 508,987 4,077,580 8.01×
      tlb-shootdown
      		 30,767 71,714 2.33×
      tsc
      		 891,772 7,094,297 7.96×
      usersyscall
      		 1,152,931 9,002,748 7.81×
      vdso
      		 109,173,032 865,399,994 7.93×
      vfork
      		 80,922 418,426 5.17×
      x86syscall
      		 20,208,995 157,638,572 7.80×
      yield
      		 13,418,244 14,260,877 1.06×
      zero
      		 10,711,795 84,733,987 7.91×
      CPU float/SIMDSingleMultiScaling
      eigen
      		 17,630 139,551 7.92×
      expmath
      		 4,029 31,947 7.93×
      fma
      		 1,577,100 12,399,033 7.86×
      fp
      		 198.79 1,680 8.45×
      fractal
      		 9 70 7.78×
      hyperbolic
      		 5,490 43,479 7.92×
      logmath
      		 5,744 45,558 7.93×
      matrix
      		 9,342 72,701 7.78×
      matrix-3d
      		 1,519 3,076 2.03×
      monte-carlo
      		 464.26 3,706 7.98×
      mpfr
      		 2,435 19,193 7.88×
      powmath
      		 1,855 14,724 7.94×
      trig
      		 2,456 19,427 7.91×
      veccmp
      		 30,393 239,222 7.87×
      vecfp
      		 2,404 19,186 7.98×
      vecmath
      		 4,774 37,876 7.93×
      vecshuf
      		 1,009 7,957 7.89×
      vecwide
      		 40,546 317,504 7.83×
      AlgorithmsSingleMultiScaling
      bitonicsort
      		 13 101.8 7.83×
      bsearch
      		 369.55 2,906 7.86×
      bubblesort
      		 1.2 9.6 8.00×
      fibsearch
      		 433.87 3,438 7.92×
      heapsort
      		 14.4 113.2 7.86×
      hsearch
      		 13,771 105,410 7.65×
      insertionsort
      		 9.6 84 8.75×
      malloc
      		 5,484,280 36,121,037 6.59×
      mcontend
      		 293.88 1,898 6.46×
      mergesort
      		 39.6 311.4 7.86×
      qsort
      		 27.2 214 7.87×
      skiplist
      		 8,549 67,177 7.86×
      tree
      		 2.6 13.6 5.23×
      MemorySingleMultiScaling
      cache
      		 1,199,942 3,798,567 3.17×
      cachehammer
      		 274,736 2,356,756 8.58×
      cacheline
      		 88.53 701.65 7.93×
      l1cache
      		 1,380 10,898 7.90×
      memcpy
      		 812.53 6,430 7.91×
      memrate
      		 0.99 4.76 4.81×
      memthrash
      		 268.36 500.65 1.87×
      ptr-chase
      		 81,098,512 79,824,012 0.98×
      spinmem
      		 295.79 312.38 1.06×
      stream
      		 162.82 1,835 11.27×
      vm
      		 243,711 292,721 1.20×

      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

      INSTANCEvCPUsMEMORYAccelerators
      c8a.medium 12 GiB0
      c8a.large 24 GiB0
      c8a.xlarge 48 GiB0
      c8a.4xlarge 1632 GiB0
      c8a.8xlarge 3264 GiB0
      c8a.12xlarge 4896 GiB0
      c8a.16xlarge 64128 GiB0

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      c8a.2xlarge FAQs