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r8i.16xlarge by Amazon Web Services

r8i.16xlarge is a Memory optimized [Intel processors] Gen8 16xlarge server offered by Amazon Web Services with 64 vCPUs, 512 GiB of memory and 0 GB of storage. The pricing starts at 0.5594 USD per hour.
64 vCPU
512 GiB Memory
Spare SCore
69209
(All-cores)
2122
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
r8i.16xlarge
Description
Memory optimized [Intel processors] Gen8 16xlarge
Family
r8i
Hw Virt
Status
active
Observed At
2026-07-29T08:53:58.038063

Availability

REGION / IDSPOTONDEMAND
Northern Virgina (US) / us-east-1
1.7991 USD/h 4.4454 USD/h
Ohio (US) / us-east-2
1.4742 USD/h 4.4454 USD/h
Oregon (US) / us-west-2
2.02005 USD/h 4.4454 USD/h
(MY) / ap-southeast-5
1.972633 USD/h 4.5581 USD/h
Mumbai (IN) / ap-south-1
1.2248 USD/h 4.5866 USD/h
Hyderabad (IN) / ap-south-2
1.268067 USD/h 4.5866 USD/h
Stockholm (SE) / eu-north-1
1.3558 USD/h 4.7277 USD/h
Quebec (CA) / ca-central-1
2.0347 USD/h 4.8688 USD/h
California (US) / us-west-1
1.9387 USD/h 4.9392 USD/h
Aragón (ES) / eu-south-2
1.4003 USD/h 4.9744 USD/h
Dublin (IE) / eu-west-1
1.8042 USD/h 4.9744 USD/h
Paris (FR) / eu-west-3
1.5742 USD/h 5.2214 USD/h
London (GB) / eu-west-2
2.752767 USD/h 5.2214 USD/h
Sydney (AU) / ap-southeast-2
2.766233 USD/h 5.3274 USD/h
Seoul (KR) / ap-northeast-2
1.771675 USD/h 5.3626 USD/h
Singapore (SG) / ap-southeast-1
2.280667 USD/h 5.3626 USD/h
Tokyo (JP) / ap-northeast-1
2.1769 USD/h 5.3626 USD/h
Frankfurt (DE) / eu-central-1
2.9866 USD/h 5.3626 USD/h
United Arab Emirates / me-central-1
2.2401 USD/h 5.472 USD/h
(NZ) / ap-southeast-6
0.5594 USD/h 5.5936 USD/h
Zurich (CH) / eu-central-2
1.956633 USD/h 5.8989 USD/h
Cape Town (ZA) / af-south-1
0.6372 USD/h 5.927 USD/h
Sao Paulo (BR) / sa-east-1
3.234867 USD/h 7.0912 USD/h

Processor

vCPUs
64
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
32
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
2 MiB
CPU L1I Cache
64 KiB
CPU L1I Cache Total
2 MiB
CPU L2 Cache
2 MiB
CPU L2 Cache Total
64 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
32.6
Scalability
101.88

System Resources and Accelerators

MEMORY
Memory Amount
512 GiB
Memory Amount Actual
512 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
      30 Gbps
      Network Speed Max
      30 Gbps
      Network Storage Speed Baseline
      20 Gbps
      Network Storage Speed Max
      20 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      Server Description

      A memory-optimized x86_64 server featuring 512 GB of DDR5 RAM and dedicated Intel Xeon processors for demanding database and caching workloads.

      Memory OptimizedGeneral Purpose

      Amazon Web Services r8i.16xlarge is a memory-optimized server instance powered by a dedicated 3.9 GHz Intel Xeon 6975P-C processor with 64 vCPUs and 32 physical cores. It features 512.0 GB of high-speed 7 GHz DDR5 memory, yielding 8.0 GB per core, but lacks local storage and GPU accelerators. Running on the Nitro hypervisor, it provides a baseline network bandwidth of 30 Gbps. Benchmark results show top-tier performance in multi-core processing, software compilation, and Redis operations, alongside strong memory read bandwidth. However, memory write speeds for large blocks remain average. With hardware-accelerated instruction sets like AVX-512 and AMX, this instance is highly efficient for memory-intensive workloads, including in-memory databases, large-scale caching, and text processing, offering a balanced tradeoff between high memory capacity and dedicated compute power without local storage overhead.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      4.6Score
      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) 14,613,586 ops/sec 1,896,415 ops/sec 7.71 50.00% 50.00% +178.00%
      Redis RPS (pipeline=16, SET) 80,733,135 ops/sec 11,539,523 ops/sec 7 20.00% 20.00% +47.60%
      PassMark Memory Mark (composite) 2,663 2,411 1.1 10.00% 10.00% +0.96%
      Memory bandwidth (read, 16 MB ~ L3) 226,285 MB/sec 107,368 MB/sec 2.11 10.00% 10.00% +7.75%
      PassMark single-thread CPU 3,267 Mops/s 2,363 Mops/s 1.38 10.00% 10.00% +3.27%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 2,188

      Geekbench Multi-Core

      Score: 21,093

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 82755
      Compression
      		 1269035
      Encryption
      		 72309
      Extended Instructions
      		 88555
      Floating Point Maths
      		 239070
      Integer Maths
      		 330263
      Physics
      		 8992
      Prime Numbers
      		 531
      Single Threaded
      		 3267
      String Sorting
      		 163903

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2663
      Database Operations
      		 28497
      Memory Latency
      		 68
      Memory Read Cached
      		 27294
      Memory Read Uncached
      		 15700
      Memory Write
      		 10825

      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.large 216 GiB0
      r8i.xlarge 432 GiB0
      r8i.2xlarge 864 GiB0
      r8i.4xlarge 16128 GiB0
      r8i.8xlarge 32256 GiB0
      r8i.12xlarge 48384 GiB0
      r8i.24xlarge 96768 GiB0

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      r8i.16xlarge FAQs