r8i.4xlarge by Amazon Web Services

r8i.4xlarge is a Memory optimized [Intel processors] Gen8 4xlarge server offered by Amazon Web Services with 16 vCPUs, 128 GiB of memory and 0 GB of storage. The pricing starts at 0.114 USD per hour.
16 vCPU
128 GiB Memory
Spare SCore
17,271
(All-cores)
2,125
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
r8i.4xlarge
Description
Memory optimized [Intel processors] Gen8 4xlarge
Family
r8i
Hw Virt
Status
active
Observed At
2026-10-27T06:58:17.791782

Availability

REGION / IDSPOTONDEMAND
Ohio (US) / us-east-2
0.296933 USD/h 1.1114 USD/h
Northern Virgina (US) / us-east-1
0.37022 USD/h 1.1114 USD/h
Oregon (US) / us-west-2
0.400325 USD/h 1.1114 USD/h
(MY) / ap-southeast-5
0.1378 USD/h 1.1395 USD/h
Hyderabad (IN) / ap-south-2
0.1147 USD/h 1.1466 USD/h
Mumbai (IN) / ap-south-1
0.329033 USD/h 1.1466 USD/h
Stockholm (SE) / eu-north-1
0.174033 USD/h 1.1819 USD/h
Calgary (CA) / ca-west-1
0.4111 USD/h 1.2172 USD/h
Quebec (CA) / ca-central-1
0.494 USD/h 1.2172 USD/h
California (US) / us-west-1
0.5566 USD/h 1.2348 USD/h
Aragón (ES) / eu-south-2
0.287967 USD/h 1.2436 USD/h
Dublin (IE) / eu-west-1
0.604567 USD/h 1.2436 USD/h
Milan (IT) / eu-south-1
0.334433 USD/h 1.3054 USD/h
London (GB) / eu-west-2
0.4205 USD/h 1.3054 USD/h
Paris (FR) / eu-west-3
0.444333 USD/h 1.3054 USD/h
Tel Aviv (IL) / il-central-1
0.4685 USD/h 1.3058 USD/h
Sydney (AU) / ap-southeast-2
0.5264 USD/h 1.3318 USD/h
Seoul (KR) / ap-northeast-2
0.48035 USD/h 1.3406 USD/h
Tokyo (JP) / ap-northeast-1
0.433367 USD/h 1.3406 USD/h
Singapore (SG) / ap-southeast-1
0.486033 USD/h 1.3406 USD/h
Frankfurt (DE) / eu-central-1
0.493767 USD/h 1.3406 USD/h
United Arab Emirates / me-central-1
0.56 USD/h 1.368 USD/h
(NZ) / ap-southeast-6
0.264133 USD/h 1.3984 USD/h
Zurich (CH) / eu-central-2
0.349667 USD/h 1.4747 USD/h
Cape Town (ZA) / af-south-1
0.298367 USD/h 1.4818 USD/h
Sao Paulo (BR) / sa-east-1
1.1291 USD/h 1.7728 USD/h

Processor

vCPUs
16
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
8
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
384 KiB
CPU L1I Cache
64 KiB
CPU L1I Cache Total
512 KiB
CPU L2 Cache
2 MiB
CPU L2 Cache Total
16 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, arch_perfmon, rep_good, nopl, xtopology, nonstop_tsc, cpuid, aperfmperf, tsc_known_freq, pni, pclmulqdq, monitor, 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
8.1
Scalability
50.62

System Resources and Accelerators

MEMORY
Memory Amount
128 GiB
Memory Amount Actual
128 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
      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 server featuring high-speed DDR5 RAM and advanced Intel matrix extensions for memory-intensive enterprise workloads.

      Memory Optimized

      Amazon Web Services r8i.4xlarge is a memory-optimized instance featuring 16 vCPUs and 8 physical cores powered by an Intel Xeon 6975P-C processor running at 3.9 GHz. Built on the x86_64 architecture and managed by the Nitro hypervisor, it delivers 128.0 GB of high-speed 7 GHz DDR5 memory, yielding 8.0 GB of RAM per core. The processor supports advanced instruction sets, including AVX-512 and Intel Advanced Matrix Extensions (AMX). While the instance lacks local storage and dedicated GPUs, it offers a baseline network bandwidth of 8 Gbps. Benchmarks highlight strong single-threaded capabilities, with top-tier performance in text processing and small-model LLM text generation. This hardware profile is highly suited for memory-intensive workloads, such as in-memory databases, text processing pipelines, and enterprise applications requiring dense memory configurations without excessive compute scaling.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      1.6Score
      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) 3,524,826 ops/sec 1,918,343 ops/sec 1.8 50.00% 50.00% +34.00%
      Redis RPS (pipeline=16, SET) 19,163,521 ops/sec 11,704,734 ops/sec 1.6 20.00% 20.00% +9.90%
      PassMark Memory Mark (composite) 2,363 2,416 1 10.00% 10.00% 0.00%
      Memory bandwidth (read, 16 MB ~ L3) 153,843 MB/sec 108,420 MB/sec 1.4 10.00% 10.00% +3.40%
      PassMark single-thread CPU 3,245 Mops/s 2,365 Mops/s 1.3 10.00% 10.00% +2.70%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 2,019

      Geekbench Multi-Core

      Score: 12,700

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 28,974
      Compression
      		 320,466
      Encryption
      		 18,205
      Extended Instructions
      		 22,273
      Floating Point Maths
      		 59,685
      Integer Maths
      		 82,384
      Physics
      		 3,731
      Prime Numbers
      		 171
      Single Threaded
      		 3,245
      String Sorting
      		 42,047

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2,363
      Database Operations
      		 8,183
      Memory Latency
      		 79
      Memory Read Cached
      		 28,961
      Memory Read Uncached
      		 13,550
      Memory Write
      		 10,820

      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.large 216 GiB0
      r8i.xlarge 432 GiB0
      r8i.2xlarge 864 GiB0
      r8i.8xlarge 32256 GiB0
      r8i.12xlarge 48384 GiB0
      r8i.16xlarge 64512 GiB0
      r8i.24xlarge 96768 GiB0

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      r8i.4xlarge FAQs