c3-256 by OVHcloud

c3-256 is a Compute Optimized (128 vCPUs, 256 GiB RAM, 400 GB NVMe) server offered by OVHcloud with 128 vCPUs, 256 GiB of memory and 400 GB of storage. The pricing starts at 3.2519 USD per hour.
128 vCPU
256 GiB Memory
400 GB Storage
Spare SCore
288,721
(All-cores)
3,076
(Single-core)

Specifications

Server Metadata

Vendor ID
ovh
Name
c3-256
Description
Compute Optimized (128 vCPUs, 256 GiB RAM, 400 GB NVMe)
Family
Compute Optimized
Hw Virt
Average Time To Start
59.33
Status
active
Observed At
2026-10-29T07:15:02.556368

Availability

REGION / IDSPOTONDEMAND
AP-SOUTHEAST-SYD-2 (AU) / AP-SOUTHEAST-SYD-2
- 3.2519 USD/h
AP-SOUTH-MUM-1 (IN) / AP-SOUTH-MUM-1
- 3.2519 USD/h
BHS5 (CA) / BHS5
- 3.2519 USD/h
DE1 (DE) / DE1
- 3.2519 USD/h
EU-SOUTH-MIL (IT) / EU-SOUTH-MIL
- 3.2519 USD/h
EU-WEST-PAR (FR) / EU-WEST-PAR
- 3.2519 USD/h
GRA11 (FR) / GRA11
- 3.2519 USD/h
GRA7 (FR) / GRA7
- 3.2519 USD/h
GRA9 (FR) / GRA9
- 3.2519 USD/h
RBX-A (FR) / RBX-A
- 3.2519 USD/h
SBG5 (FR) / SBG5
- 3.2519 USD/h
SBG7 (FR) / SBG7
- 3.2519 USD/h
SGP1 (SG) / SGP1
- 3.2519 USD/h
SYD1 (AU) / SYD1
- 3.2519 USD/h
UK1 (GB) / UK1
- 3.2519 USD/h
WAW1 (PL) / WAW1
- 3.2519 USD/h

Processor

vCPUs
128
Hypervisor
KVM
CPU Allocation
Dedicated
CPU Cores
128
CPU Speed
2.3 GHz
CPU Architecture
x86_64
CPU Manufacturer
AMD
CPU Family
EPYC
CPU L1D Cache
32 KiB
CPU L1D Cache Total
4 MiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
4 MiB
CPU L2 Cache
512 KiB
CPU L2 Cache Total
64 MiB
CPU L3 Cache
32 MiB
CPU L3 Cache Total
4 GiB
CPU Flags
fpu, vme, de, pse, tsc, msr, pae, mce, cx8, apic, sep, mtrr, pge, mca, cmov, pat, pse36, clflush, mmx, fxsr, sse, sse2, syscall, nx, mmxext, fxsr_opt, pdpe1gb, rdtscp, lm, rep_good, nopl, cpuid, extd_apicid, tsc_known_freq, pni, pclmulqdq, ssse3, fma, cx16, pcid, sse4_1, sse4_2, x2apic, movbe, popcnt, aes, xsave, avx, f16c, rdrand, hypervisor, lahf_lm, svm, cr8_legacy, abm, sse4a, misalignsse, 3dnowprefetch, osvw, topoext, perfctr_core, ssbd, ibrs, ibpb, stibp, vmmcall, fsgsbase, bmi1, avx2, smep, bmi2, erms, invpcid, rdseed, adx, smap, clflushopt, clwb, sha_ni, xsaveopt, xsavec, xgetbv1, xsaves, clzero, xsaveerptr, wbnoinvd, arat, npt, nrip_save, umip, pku, ospke, rdpid, fsrm
Ecpus
93.9
Scalability
73.36

System Resources and Accelerators

MEMORY
Memory Amount
256 GiB
Memory Amount Actual
250 GiB
ACCELERATORS
Accelerator Count
0
Accelerator Memory Min
0 MiB
Accelerator Memory Total
0 MiB
Accelerators
    STORAGE
    Storage Size
    400 GB
    Storage Type
    nvme ssd
    Storages
    • 400 GB nvme ssd
    NETWORK
    Network Speed Baseline
    20 Gbps
    Network Speed Max
    20 Gbps
    Inbound Traffic
    0 GB/month
    Outbound Traffic
    0 GB/month
    IPv4
    1

    CPU and System Topology

    Server Description

    A dedicated AMD EPYC instance featuring one hundred twenty-eight physical cores and local NVMe storage for parallelized workloads.

    Compute OptimizedStorage & Database

    OVHcloud c3-256 is a compute-optimized server featuring 128 dedicated AMD EPYC physical cores running at 2.3 GHz on a KVM hypervisor. It is equipped with 256 GB of RAM, a 400 GB NVMe SSD, and a 20 Gbps baseline network interface. The instance delivers top-tier multi-core performance, as evidenced by its top 10% rankings in stress-ng multi-core, Passmark CPU, and multi-threaded bzip3 decompression benchmarks. While single-core performance and uncached write speeds fall into the average range, its high parallel processing capacity and strong memory read bandwidth make it highly efficient for multi-threaded tasks. The 2.0 GB of memory per core represents a tradeoff for memory-intensive applications, but the server remains highly capable for software compilation, database operations, and static web serving.

    Economics

    Average Price per Region

    Prices per Zone

    Lowest Prices

    Performance

    Workload Profiles

    3.5Score
    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) 8,880,089 ops/sec 1,919,289 ops/sec 4.7 50.00% 50.00% +120.00%
    Redis RPS (pipeline=16, SET) 86,209,578 ops/sec 11,728,058 ops/sec 7.2 20.00% 20.00% +48.00%
    PassMark Memory Mark (composite) 2,997 2,416 1.2 10.00% 10.00% +1.80%
    Memory bandwidth (read, 16 MB ~ L3) 197,294 MB/sec 108,466 MB/sec 1.8 10.00% 10.00% +6.10%
    PassMark single-thread CPU 2,939 Mops/s 2,365 Mops/s 1.2 10.00% 10.00% +1.80%

    Memory Bandwidth

    Compression

    OpenSSL

    Geekbench Single-Core

    Score: 1,889

    Geekbench Multi-Core

    Score: 18,559

    Passmark CPU Scores

    BENCHMARKSCORE
    Mark
    		 111,517
    Compression
    		 2,191,566
    Encryption
    		 136,506
    Extended Instructions
    		 146,115
    Floating Point Maths
    		 434,758
    Integer Maths
    		 672,461
    Physics
    		 14,421
    Prime Numbers
    		 1,361
    Single Threaded
    		 2,939
    String Sorting
    		 296,700

    Passmark Memory Scores

    BENCHMARKSCORE
    Memory Mark
    		 2,997
    Database Operations
    		 30,228
    Memory Latency
    		 70
    Memory Read Cached
    		 27,770
    Memory Read Uncached
    		 27,079
    Memory Write
    		 21,814

    Stress-ng Stressors

    CPU integerSingleMultiScaling
    atomic
    		 872.98 254.52 0.29×
    bitops
    		 160,265 13,872,906 86.56×
    branch
    		 213,286 18,541,407 86.93×
    funccall
    		 619.08 55,589 89.79×
    funcret
    		 21,265 1,759,811 82.76×
    hash
    		 163,072 16,288,997 99.89×
    intmath
    		 66,791 6,806,081 101.90×
    nop
    		 625,143 58,065,052 92.88×
    prime
    		 495,348 40,678,600 82.12×
    rotate
    		 88,247 8,036,624 91.07×
    str
    		 1,043,868 74,337,272 71.21×
    wcs
    		 680,284 47,898,859 70.41×
    CryptographySingleMultiScaling
    crypt
    		 3,741 288,842 77.20×
    CompressionSingleMultiScaling
    jpeg
    		 891.56 37,196 41.72×
    zlib
    		 85.53 6,365 74.42×
    HypervisorSingleMultiScaling
    clock
    		 13,602 203,102 14.93×
    clone
    		 308.23 4,768 15.47×
    context
    		 1,759 183,285 104.18×
    cpu-sched
    		 64.9 7,785 119.96×
    eventfd
    		 43,891 2,753,779 62.74×
    fault
    		 10,089 121,847 12.08×
    fork
    		 2,893 66,691 23.05×
    getrandom
    		 48,306 4,262,358 88.24×
    hrtimers
    		 283,248 8,777,798 30.99×
    mprotect
    		 585,305 15,961,275 27.27×
    mtx
    		 29,744,018 7,189,842,950 241.72×
    munmap
    		 2,098 75,291 35.89×
    null
    		 190,142 19,089,794 100.40×
    pipe
    		 392,739 20,461,996 52.10×
    priv-instr
    		 332,791 16,139,730 48.50×
    resched
    		 5,839,985 13,156,283 2.25×
    switch
    		 114,856 10,652,990 92.75×
    timermix
    		 132,583 12,835,250 96.81×
    tlb-shootdown
    		 14,721 214,291 14.56×
    tsc
    		 782,556 96,851,025 123.76×
    usersyscall
    		 238,059 15,878,314 66.70×
    vdso
    		 82,320,105 8,170,031,009 99.25×
    vfork
    		 19,512 100,593 5.16×
    x86syscall
    		 2,150,183 217,194,206 101.01×
    yield
    		 51,952,263 65,477,011 1.26×
    zero
    		 1,688,215 166,359,078 98.54×
    CPU float/SIMDSingleMultiScaling
    eigen
    		 16,607 1,343,361 80.89×
    expmath
    		 2,966 282,474 95.24×
    fma
    		 918,188 81,957,039 89.26×
    fp
    		 251.86 24,044 95.47×
    fractal
    		 7.4 657.67 88.87×
    hyperbolic
    		 3,820 360,952 94.49×
    logmath
    		 4,557 414,914 91.05×
    matrix
    		 4,972 358,109 72.03×
    matrix-3d
    		 929.18 7,826 8.42×
    monte-carlo
    		 106.75 10,350 96.95×
    mpfr
    		 1,687 139,337 82.61×
    powmath
    		 1,314 131,737 100.25×
    trig
    		 1,835 167,337 91.17×
    veccmp
    		 19,042 1,539,852 80.87×
    vecfp
    		 1,812 154,807 85.42×
    vecmath
    		 4,035 384,279 95.24×
    vecshuf
    		 638.7 55,374 86.70×
    vecwide
    		 28,600 2,071,192 72.42×
    AlgorithmsSingleMultiScaling
    bitonicsort
    		 10.4 841.77 80.94×
    bsearch
    		 311.7 25,293 81.15×
    bubblesort
    		 1 68.4 68.40×
    fibsearch
    		 380.3 34,228 90.00×
    heapsort
    		 10.8 905.77 83.87×
    hsearch
    		 11,301 837,763 74.13×
    insertionsort
    		 13.2 875.19 66.30×
    malloc
    		 3,616,588 192,269,162 53.16×
    mcontend
    		 79.13 18,978 239.83×
    mergesort
    		 34.4 2,825 82.13×
    qsort
    		 22 1,742 79.16×
    skiplist
    		 7,035 646,907 91.95×
    tree
    		 2 128.24 64.12×
    MemorySingleMultiScaling
    cache
    		 750,353 1,543,252 2.06×
    cachehammer
    		 283,499 18,880,941 66.60×
    cacheline
    		 75.96 4,563 60.07×
    l1cache
    		 263.1 21,324 81.05×
    memcpy
    		 448.55 34,492 76.90×
    memrate
    		 3.51 24.53 6.99×
    memthrash
    		 343.21 296.43 0.86×
    ptr-chase
    		 39,554,092 958,804,996 24.24×
    spinmem
    		 177.59 4,855 27.34×
    stream
    		 120.58 88,678 735.43×
    vm
    		 59,694 309,511 5.18×

    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
    c3-4 24 GiB0
    c2-7 27 GiB0
    c3-8 48 GiB0
    c2-15 415 GiB0
    c3-16 816 GiB0
    c2-30 830 GiB0
    c3-32 1632 GiB0

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    c3-256 FAQs