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r8i-flex.8xlarge by Amazon Web Services

r8i-flex.8xlarge is a Memory optimized [Intel processors] Gen8 8xlarge server offered by Amazon Web Services with 32 vCPUs, 256 GiB of memory and 0 GB of storage. The pricing starts at 0.3355 USD per hour.
32 vCPU
256 GiB Memory
Spare SCore
34440
(All-cores)
2131
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
r8i-flex.8xlarge
Description
Memory optimized [Intel processors] Gen8 8xlarge
Family
r8i-flex
Hw Virt
Status
active
Observed At
2026-07-29T08:53:58.037026

Availability

REGION / IDSPOTONDEMAND
Ohio (US) / us-east-2
0.696767 USD/h 2.1115 USD/h
Oregon (US) / us-west-2
0.873075 USD/h 2.1115 USD/h
Northern Virgina (US) / us-east-1
0.97548 USD/h 2.1115 USD/h
(MY) / ap-southeast-5
0.7351 USD/h 2.1651 USD/h
Mumbai (IN) / ap-south-1
0.486267 USD/h 2.1786 USD/h
Hyderabad (IN) / ap-south-2
0.6793 USD/h 2.1786 USD/h
Stockholm (SE) / eu-north-1
0.561 USD/h 2.2456 USD/h
Quebec (CA) / ca-central-1
0.777967 USD/h 2.3126 USD/h
California (US) / us-west-1
0.8323 USD/h 2.3461 USD/h
Aragón (ES) / eu-south-2
0.523667 USD/h 2.3629 USD/h
Dublin (IE) / eu-west-1
1.070833 USD/h 2.3629 USD/h
Paris (FR) / eu-west-3
0.718733 USD/h 2.4802 USD/h
London (GB) / eu-west-2
1.006233 USD/h 2.4802 USD/h
Sydney (AU) / ap-southeast-2
0.877233 USD/h 2.5306 USD/h
Seoul (KR) / ap-northeast-2
0.784725 USD/h 2.5472 USD/h
Tokyo (JP) / ap-northeast-1
0.8053 USD/h 2.5472 USD/h
Frankfurt (DE) / eu-central-1
0.9358 USD/h 2.5472 USD/h
Singapore (SG) / ap-southeast-1
1.0336 USD/h 2.5472 USD/h
(NZ) / ap-southeast-6
0.9384 USD/h 2.657 USD/h
Zurich (CH) / eu-central-2
1.037567 USD/h 2.8019 USD/h
Cape Town (ZA) / af-south-1
0.4818 USD/h 2.8154 USD/h
Sao Paulo (BR) / sa-east-1
1.0084 USD/h 3.3683 USD/h

Processor

vCPUs
32
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
16
CPU Speed
3.9 GHz
CPU Architecture
x86_64
CPU Manufacturer
Intel
CPU Family
Xeon
CPU Model
6975P-C
CPU L1D Cache
48 KiB
CPU L1D Cache Total
768 KiB
CPU L1I Cache
64 KiB
CPU L1I Cache Total
1 MiB
CPU L2 Cache
2 MiB
CPU L2 Cache Total
32 MiB
CPU L3 Cache
480 MiB
CPU L3 Cache Total
480 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, ss, ht, syscall, nx, pdpe1gb, rdtscp, lm, constant_tsc, rep_good, nopl, xtopology, nonstop_tsc, cpuid, tsc_known_freq, pni, pclmulqdq, ssse3, fma, cx16, pdcm, pcid, sse4_1, sse4_2, x2apic, movbe, popcnt, tsc_deadline_timer, aes, xsave, avx, f16c, rdrand, hypervisor, lahf_lm, abm, 3dnowprefetch, cpuid_fault, ssbd, ibrs, ibpb, stibp, ibrs_enhanced, 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, wbnoinvd, ida, arat, avx512vbmi, umip, pku, ospke, waitpkg, avx512_vbmi2, gfni, vaes, vpclmulqdq, avx512_vnni, avx512_bitalg, tme, avx512_vpopcntdq, rdpid, bus_lock_detect, cldemote, movdiri, movdir64b, md_clear, serialize, amx_bf16, avx512_fp16, amx_tile, amx_int8, flush_l1d, arch_capabilities
Ecpus
16.2
Scalability
101.25

System Resources and Accelerators

MEMORY
Memory Amount
256 GiB
Memory Amount Actual
256 GiB
Memory Generation
DDR5
Memory Speed
7200 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
      7.5 Gbps
      Network Speed Max
      15 Gbps
      Network Storage Speed Baseline
      5 Gbps
      Network Storage Speed Max
      10 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      Server Description

      A memory-optimized x86_64 platform featuring 256 GB of DDR5 RAM and Intel Xeon processors for memory-intensive computing and text processing.

      Memory OptimizedGeneral Purpose

      Amazon Web Services r8i-flex.8xlarge is a memory-optimized instance featuring 32 dedicated vCPUs and 16 physical cores powered by an Intel Xeon 6975P-C processor running at 3.9 GHz. Built on the x86_64 architecture and the Nitro hypervisor, it includes 256.0 GB of high-speed 7 GHz DDR5 memory, a 480 MB L3 cache, and a baseline network bandwidth of 8 Gbps, with no local storage or GPUs. Benchmarks show top-tier single-core and text processing performance, alongside strong results in cryptography and small-model LLM inference. However, large-model text generation is weak, and memory bandwidth remains average. This resource profile makes the instance highly efficient for memory-intensive workloads, web serving, and text processing pipelines that benefit from high memory density and advanced instruction sets like AVX-512 and Intel AMX without requiring local storage.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      2.75Score
      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) 7,079,716 ops/sec 1,896,415 ops/sec 3.73 50.00% 50.00% +93.10%
      Redis RPS (pipeline=16, SET) 38,649,397 ops/sec 11,539,523 ops/sec 3.35 20.00% 20.00% +27.40%
      PassMark Memory Mark (composite) 2,454 2,411 1.02 10.00% 10.00% +0.20%
      Memory bandwidth (read, 16 MB ~ L3) 227,619 MB/sec 107,368 MB/sec 2.12 10.00% 10.00% +7.80%
      PassMark single-thread CPU 3,287 Mops/s 2,363 Mops/s 1.39 10.00% 10.00% +3.35%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 2,186

      Geekbench Multi-Core

      Score: 17,619

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 51371
      Compression
      		 632176
      Encryption
      		 36101
      Extended Instructions
      		 45559
      Floating Point Maths
      		 117860
      Integer Maths
      		 163193
      Physics
      		 6597
      Prime Numbers
      		 347
      Single Threaded
      		 3287
      String Sorting
      		 83030

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2454
      Database Operations
      		 16618
      Memory Latency
      		 68
      Memory Read Cached
      		 29079
      Memory Read Uncached
      		 9662
      Memory Write
      		 11228

      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
      r8i-flex.large 216 GiB0
      r8i-flex.xlarge 432 GiB0
      r8i-flex.2xlarge 864 GiB0
      r8i-flex.4xlarge 16128 GiB0
      r8i-flex.12xlarge 48384 GiB0
      r8i-flex.16xlarge 64512 GiB0

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      r8i-flex.8xlarge FAQs