c8a.metal-48xl by Amazon Web Services

c8a.metal-48xl is a Compute optimized [AMD processors] Gen8 metal-48xl server offered by Amazon Web Services with 192 vCPUs, 384 GiB of memory and 0 GB of storage. The pricing starts at 1.1099 USD per hour.
192 vCPU
384 GiB Memory
Spare SCore
687,082
(All-cores)
3,774
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
c8a.metal-48xl
Description
Compute optimized [AMD processors] Gen8 metal-48xl
Family
c8a
Hw Virt
Average Time To Start
29.5
Status
active
Observed At
2026-10-25T01:22:14.265472

Availability

REGION / IDSPOTONDEMAND
Ohio (US) / us-east-2
2.9931 USD/h 10.3459 USD/h
Northern Virgina (US) / us-east-1
3.80746 USD/h 10.3459 USD/h
Oregon (US) / us-west-2
3.3662 USD/h 10.3459 USD/h
Aragón (ES) / eu-south-2
3.0493 USD/h 11.0986 USD/h
Dublin (IE) / eu-west-1
2.54615 USD/h 11.1005 USD/h
Frankfurt (DE) / eu-central-1
7.706967 USD/h 11.807 USD/h
Tokyo (JP) / ap-northeast-1
3.8074 USD/h 13.0234 USD/h

Processor

vCPUs
192
CPU Allocation
Dedicated
CPU Cores
192
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
9 MiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
6 MiB
CPU L2 Cache
1 MiB
CPU L2 Cache Total
192 MiB
CPU L3 Cache
32 MiB
CPU L3 Cache Total
768 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, amd_lbr_v2, nopl, xtopology, nonstop_tsc, cpuid, extd_apicid, aperfmperf, rapl, pni, pclmulqdq, monitor, ssse3, fma, cx16, pcid, sse4_1, sse4_2, x2apic, movbe, popcnt, aes, xsave, avx, f16c, rdrand, lahf_lm, cmp_legacy, svm, extapic, cr8_legacy, abm, sse4a, misalignsse, 3dnowprefetch, osvw, ibs, skinit, wdt, tce, topoext, perfctr_core, perfctr_nb, bpext, perfctr_llc, mwaitx, cpb, cat_l3, cdp_l3, hw_pstate, ssbd, mba, perfmon_v2, ibrs, ibpb, stibp, vmmcall, fsgsbase, tsc_adjust, bmi1, avx2, smep, bmi2, erms, invpcid, cqm, rdt_a, avx512f, avx512dq, rdseed, adx, smap, avx512ifma, clflushopt, clwb, avx512cd, sha_ni, avx512bw, avx512vl, xsaveopt, xsavec, xgetbv1, xsaves, cqm_llc, cqm_occup_llc, cqm_mbm_total, cqm_mbm_local, user_shstk, avx_vnni, avx512_bf16, clzero, irperf, xsaveerptr, rdpru, wbnoinvd, amd_ppin, cppc, arat, npt, lbrv, svm_lock, nrip_save, tsc_scale, vmcb_clean, flushbyasid, decodeassists, pausefilter, pfthreshold, avic, v_vmsave_vmload, vgif, x2avic, v_spec_ctrl, vnmi, avx512vbmi, umip, pku, ospke, avx512_vbmi2, gfni, vaes, vpclmulqdq, avx512_vnni, avx512_bitalg, avx512_vpopcntdq, la57, rdpid, bus_lock_detect, movdiri, movdir64b, overflow_recov, succor, smca, fsrm, avx512_vp2intersect, flush_l1d, sev, sev_es, sev_snp, debug_swap, amd_lbr_pmc_freeze
Ecpus
182
Scalability
94.79

System Resources and Accelerators

MEMORY
Memory Amount
384 GiB
Memory Amount Actual
384 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
      75 Gbps
      Network Speed Max
      75 Gbps
      Network Storage Speed Baseline
      60 Gbps
      Network Storage Speed Max
      60 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      CPU and System Topology

      Server Description

      A high-density bare-metal compute platform featuring 192 AMD EPYC cores and DDR5 memory for demanding parallel processing workloads.

      Compute OptimizedGeneral Purpose

      Amazon Web Services c8a.metal-48xl is a bare-metal, compute-optimized server featuring 192 dedicated physical cores and 192 vCPUs powered by AMD EPYC 9R45 processors running at 4.5 GHz. The hardware configuration includes 384.0 GB of high-speed DDR5 memory at 6 GHz, yielding a 1:2 vCPU-to-RAM ratio, with no local storage or onboard GPUs. It delivers a baseline network bandwidth of 75 Gbps. Benchmarks place this instance in the top 10% for multi-core CPU performance, memory bandwidth, and database operations. It supports advanced vector extensions (AVX-512) and cryptographic acceleration. This server is engineered for high-density compute workloads, large-scale web serving, Redis databases, and LLM prompt processing.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      13Score
      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) 47,854,420 ops/sec 1,919,289 ops/sec 25 50.00% 50.00% +400.00%
      Redis RPS (pipeline=16, SET) 314,032,449 ops/sec 11,728,058 ops/sec 26 20.00% 20.00% +92.00%
      PassMark Memory Mark (composite) 2,845 2,416 1.2 10.00% 10.00% +1.80%
      Memory bandwidth (read, 16 MB ~ L3) 1,337,865 MB/sec 108,466 MB/sec 12 10.00% 10.00% +28.00%
      PassMark single-thread CPU 3,787 Mops/s 2,365 Mops/s 1.6 10.00% 10.00% +4.80%

      Memory Bandwidth

      Compression

      OpenSSL

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 183,010
      Compression
      		 4,717,902
      Encryption
      		 268,765
      Extended Instructions
      		 392,003
      Floating Point Maths
      		 1,268,267
      Integer Maths
      		 1,388,907
      Physics
      		 55,126
      Prime Numbers
      		 4,125
      Single Threaded
      		 3,787
      String Sorting
      		 621,413

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2,845
      Database Operations
      		 43,613
      Memory Latency
      		 83
      Memory Read Cached
      		 33,538
      Memory Read Uncached
      		 32,399
      Memory Write
      		 20,857

      Stress-ng Stressors

      CPU integerSingleMultiScaling
      atomic
      		 498.83 328.56 0.66×
      bitops
      		 228,471 36,299,419 158.88×
      branch
      		 165,258 28,523,011 172.60×
      funccall
      		 909.37 138,496 152.30×
      funcret
      		 27,045 4,116,121 152.20×
      hash
      		 217,649 36,843,082 169.28×
      intmath
      		 78,619 14,014,363 178.26×
      nop
      		 432,721 78,558,668 181.55×
      prime
      		 615,015 88,561,201 144.00×
      rotate
      		 142,961 25,045,097 175.19×
      str
      		 1,547,684 199,975,268 129.21×
      wcs
      		 1,021,986 134,605,316 131.71×
      CryptographySingleMultiScaling
      crypt
      		 5,473 787,230 143.83×
      CompressionSingleMultiScaling
      jpeg
      		 1,230 145,256 118.10×
      zlib
      		 70.5 11,009 156.15×
      HypervisorSingleMultiScaling
      clock
      		 50,283 204,809 4.07×
      clone
      		 250.66 13,952 55.66×
      context
      		 9,218 1,546,762 167.80×
      cpu-sched
      		 71 11,539 162.51×
      eventfd
      		 157,622 9,987,832 63.37×
      fault
      		 40,980 177,200 4.32×
      fork
      		 4,176 65,222 15.62×
      getrandom
      		 101,537 15,168,850 149.39×
      hrtimers
      		 134,395 5,272,701 39.23×
      mprotect
      		 555,067 37,939,239 68.35×
      mtx
      		 43,090,158 11,689,952,701 271.29×
      munmap
      		 3,588 64,161 17.88×
      null
      		 1,669,334 255,485,380 153.05×
      pipe
      		 3,211,299 119,920,336 37.34×
      priv-instr
      		 1,496,509 21,547,200 14.40×
      resched
      		 5,819,414 60,951,550 10.47×
      switch
      		 369,087 97,350,407 263.76×
      timermix
      		 1,227,701 195,524,942 159.26×
      tlb-shootdown
      		 12,123 609,296 50.26×
      tsc
      		 894,418 167,268,224 187.01×
      usersyscall
      		 1,166,760 21,254,056 18.22×
      vdso
      		 109,479,651 18,362,954,123 167.73×
      vfork
      		 35,174 129,880 3.69×
      x86syscall
      		 23,234,339 3,581,926,779 154.17×
      yield
      		 283,125,351 330,552,133 1.17×
      zero
      		 11,127,853 1,625,108,103 146.04×
      CPU float/SIMDSingleMultiScaling
      eigen
      		 17,631 2,775,926 157.44×
      expmath
      		 4,002 650,330 162.50×
      fma
      		 1,581,001 239,929,672 151.76×
      fp
      		 198.24 33,663 169.81×
      fractal
      		 9 1,414 157.09×
      hyperbolic
      		 5,205 856,645 164.58×
      logmath
      		 5,637 923,833 163.87×
      matrix
      		 9,379 1,153,256 122.97×
      matrix-3d
      		 1,505 35,419 23.53×
      monte-carlo
      		 485.99 72,271 148.71×
      mpfr
      		 2,422 350,887 144.86×
      powmath
      		 1,838 308,559 167.86×
      trig
      		 2,342 367,862 157.07×
      veccmp
      		 30,414 4,394,559 144.49×
      vecfp
      		 2,413 372,565 154.40×
      vecmath
      		 4,769 788,577 165.36×
      vecshuf
      		 1,008 151,407 150.23×
      vecwide
      		 40,515 5,542,035 136.79×
      AlgorithmsSingleMultiScaling
      bitonicsort
      		 12.8 1,833 143.23×
      bsearch
      		 364.53 52,669 144.48×
      bubblesort
      		 1.2 153.8 128.17×
      fibsearch
      		 414.51 65,239 157.39×
      heapsort
      		 13.8 1,924 139.40×
      hsearch
      		 11,228 1,628,825 145.07×
      insertionsort
      		 9.6 1,408 146.67×
      malloc
      		 3,410,637 245,883,824 72.09×
      mcontend
      		 70.28 28,158 400.66×
      mergesort
      		 37.2 5,338 143.49×
      qsort
      		 25.8 3,720 144.20×
      skiplist
      		 7,927 1,215,007 153.27×
      tree
      		 2.6 269.35 103.60×
      MemorySingleMultiScaling
      cache
      		 951,579 3,162,310 3.32×
      cachehammer
      		 277,625 11,450,271 41.24×
      cacheline
      		 46.37 4,200 90.57×
      l1cache
      		 1,379 157,669 114.38×
      memcpy
      		 809.71 121,657 150.25×
      memrate
      		 0.97 62.02 63.94×
      memthrash
      		 477 2,060 4.32×
      ptr-chase
      		 73,651,730 1,750,229,542 23.76×
      spinmem
      		 1,025 43,319 42.28×
      stream
      		 87.63 313,020 3572.06×
      vm
      		 237,052 313,322 1.32×

      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.2xlarge 816 GiB0
      c8a.4xlarge 1632 GiB0
      c8a.8xlarge 3264 GiB0
      c8a.12xlarge 4896 GiB0

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      c8a.metal-48xl FAQs