r8i-flex.xlarge by Amazon Web Services

r8i-flex.xlarge is a Memory optimized [Intel processors] Gen8 xlarge server offered by Amazon Web Services with 4 vCPUs, 32 GiB of memory and 0 GB of storage. The pricing starts at 0.0272 USD per hour.
4 vCPU
32 GiB Memory
Spare SCore
4,316
(All-cores)
2,122
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
r8i-flex.xlarge
API Reference Object
-
Description
Memory optimized [Intel processors] Gen8 xlarge
Family
r8i-flex
Hw Virt
Status
active
Observed At
2026-10-17T07:16:38.110117

Availability

REGION / IDSPOTONDEMAND
Ohio (US) / us-east-2
0.062133 USD/h 0.2639 USD/h
Oregon (US) / us-west-2
0.0959 USD/h 0.2639 USD/h
Northern Virgina (US) / us-east-1
0.11188 USD/h 0.2639 USD/h
(MY) / ap-southeast-5
0.078633 USD/h 0.2706 USD/h
Hyderabad (IN) / ap-south-2
0.0272 USD/h 0.2723 USD/h
Mumbai (IN) / ap-south-1
0.0783 USD/h 0.2723 USD/h
Stockholm (SE) / eu-north-1
0.0497 USD/h 0.2807 USD/h
Quebec (CA) / ca-central-1
0.096767 USD/h 0.2891 USD/h
Calgary (CA) / ca-west-1
0.07 USD/h 0.2891 USD/h
California (US) / us-west-1
0.0915 USD/h 0.2933 USD/h
Aragón (ES) / eu-south-2
0.049233 USD/h 0.2954 USD/h
Dublin (IE) / eu-west-1
0.1484 USD/h 0.2954 USD/h
Milan (IT) / eu-south-1
0.0689 USD/h 0.31 USD/h
London (GB) / eu-west-2
0.098433 USD/h 0.31 USD/h
Paris (FR) / eu-west-3
0.1043 USD/h 0.31 USD/h
Sydney (AU) / ap-southeast-2
0.106033 USD/h 0.3163 USD/h
Seoul (KR) / ap-northeast-2
0.06085 USD/h 0.3184 USD/h
Singapore (SG) / ap-southeast-1
0.110633 USD/h 0.3184 USD/h
Tokyo (JP) / ap-northeast-1
0.109333 USD/h 0.3184 USD/h
Frankfurt (DE) / eu-central-1
0.142167 USD/h 0.3184 USD/h
(NZ) / ap-southeast-6
0.095633 USD/h 0.3321 USD/h
Zurich (CH) / eu-central-2
0.103633 USD/h 0.3502 USD/h
Cape Town (ZA) / af-south-1
0.100433 USD/h 0.3519 USD/h
Sao Paulo (BR) / sa-east-1
0.060367 USD/h 0.421 USD/h

Processor

vCPUs
4
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
2
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
96 KiB
CPU L1I Cache
64 KiB
CPU L1I Cache Total
128 KiB
CPU L2 Cache
2 MiB
CPU L2 Cache Total
4 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
2
Scalability
50

System Resources and Accelerators

MEMORY
Memory Amount
32 GiB
Memory Amount Actual
32 GiB
Memory Generation
DDR5
Memory Speed
7200 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
      0.937 Gbps
      Network Speed Max
      12.5 Gbps
      Network Storage Speed Baseline
      0.63 Gbps
      Network Storage Speed Max
      10 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      Server Description

      A memory-optimized instance pairing strong single-core performance with DDR5 memory for caching and single-threaded data processing workloads.

      Memory OptimizedGeneral Purpose

      Amazon Web Services r8i-flex.xlarge is a memory-optimized instance utilizing the Nitro hypervisor and an Intel Xeon 6975P-C processor. It provides 4 dedicated vCPUs across 2 physical cores running at 3.9 GHz, paired with 32.0 GB of DDR5 memory. The instance lacks local storage and GPUs, relying on a 1 Gbps baseline network. Performance benchmarks reveal strong single-core capabilities, particularly in text processing and single-threaded compression, alongside average performance in Redis operations and web serving. However, multi-core scaling and read-only memory bandwidth represent key tradeoffs, landing in the lower performance tiers. This profile makes the instance qualitatively cost-efficient for memory-heavy, single-threaded, or bursty workloads such as caching, light database tasks, and text processing, rather than sustained multi-threaded compute.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      0.54Score
      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) 876,930 ops/sec 1,917,050 ops/sec 0.46 50.00% 50.00% -32.00%
      Redis RPS (pipeline=16, SET) 4,849,836 ops/sec 11,661,818 ops/sec 0.4 20.00% 20.00% -17.00%
      PassMark Memory Mark (composite) 2,144 2,417 0.88 10.00% 10.00% -1.30%
      Memory bandwidth (read, 16 MB ~ L3) 58,936 MB/sec 108,361 MB/sec 0.54 10.00% 10.00% -6.00%
      PassMark single-thread CPU 3,267 Mops/s 2,365 Mops/s 1.4 10.00% 10.00% +3.40%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 2,101

      Geekbench Multi-Core

      Score: 4,838

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 8057
      Compression
      		 80930
      Encryption
      		 4563
      Extended Instructions
      		 5612
      Floating Point Maths
      		 14927
      Integer Maths
      		 20577
      Physics
      		 1002
      Prime Numbers
      		 45
      Single Threaded
      		 3267
      String Sorting
      		 10719

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2144
      Database Operations
      		 2402
      Memory Latency
      		 75
      Memory Read Cached
      		 29043
      Memory Read Uncached
      		 12464
      Memory Write
      		 10718

      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

      INSTANCEvCPUsMEMORYAccelerators
      r8i-flex.large 216 GiB0
      r8i-flex.2xlarge 864 GiB0
      r8i-flex.4xlarge 16128 GiB0
      r8i-flex.8xlarge 32256 GiB0
      r8i-flex.12xlarge 48384 GiB0
      r8i-flex.16xlarge 64512 GiB0

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      r8i-flex.xlarge FAQs