r7iz.12xlarge by Amazon Web Services

r7iz.12xlarge is a Memory optimized [Intel processors] [High performance] Gen7 12xlarge server offered by Amazon Web Services with 48 vCPUs, 384 GiB of memory and 0 GB of storage. The pricing starts at 1.2347 USD per hour.
48 vCPU
384 GiB Memory
Spare SCore
51,907
(All-cores)
2,112
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
r7iz.12xlarge
Description
Memory optimized [Intel processors] [High performance] Gen7 12xlarge
Family
r7iz
Hw Virt
Status
active
Observed At
2026-09-19T16:19:06.378303

Availability

REGION / IDSPOTONDEMAND
Northern Virgina (US) / us-east-1
1.7608 USD/h 4.464 USD/h
Ohio (US) / us-east-2
1.886633 USD/h 4.464 USD/h
Oregon (US) / us-west-2
2.13865 USD/h 4.464 USD/h
Dublin (IE) / eu-west-1
2.0614 USD/h 4.992 USD/h
Frankfurt (DE) / eu-central-1
2.507133 USD/h 5.4 USD/h
Tokyo (JP) / ap-northeast-1
1.6377 USD/h 5.448 USD/h

Processor

vCPUs
48
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
24
CPU Speed
3.9 GHz
CPU Architecture
x86_64
CPU Manufacturer
Intel
CPU Family
Xeon
CPU Model
6455B
CPU L1D Cache
48 KiB
CPU L1D Cache Total
1 MiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
768 KiB
CPU L2 Cache
2 MiB
CPU L2 Cache Total
48 MiB
CPU L3 Cache
60 MiB
CPU L3 Cache Total
60 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, 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, cldemote, movdiri, movdir64b, md_clear, serialize, amx_bf16, avx512_fp16, amx_tile, amx_int8, flush_l1d, arch_capabilities
Ecpus
24.6
Scalability
102.5

System Resources and Accelerators

MEMORY
Memory Amount
384 GiB
Memory Amount Actual
384 GiB
Memory Generation
DDR5
Memory Speed
4800 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
      25 Gbps
      Network Speed Max
      25 Gbps
      Network Storage Speed Baseline
      19 Gbps
      Network Storage Speed Max
      19 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      Server Description

      A high-frequency, memory-optimized instance featuring DDR5 RAM and advanced matrix extensions for demanding database and compute workloads.

      Memory OptimizedCompute Optimized

      Amazon Web Services r7iz.12xlarge is a memory-optimized instance featuring 48 vCPUs powered by dedicated 3.9 GHz Intel Xeon 6455B processors and 384.0 GB of 5 GHz DDR5 memory. Built on the Nitro hypervisor, this instance lacks local storage and GPUs but provides a baseline network speed of 25 Gbps. It delivers strong performance across memory and compute benchmarks, highlighted by a top-tier Geekbench single-core score of 2278.0 and a memory read bandwidth of 244.1 GB/sec for large blocks. The integration of Intel AMX and AVX-512 instruction sets enhances its capability for complex mathematical operations. Qualitatively, the instance provides high resource density for workloads requiring both high-frequency processing and large memory capacity. It is highly suited for in-memory databases, enterprise relational databases, software compilation, and CPU-based machine learning inference.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      3.4Score
      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) 10,109,500 ops/sec 1,919,696 ops/sec 5.27 50.00% 50.00% +130.00%
      Redis RPS (pipeline=16, SET) 45,022,171 ops/sec 11,736,081 ops/sec 3.84 20.00% 20.00% +30.90%
      PassMark Memory Mark (composite) 2,568 2,418 1.06 10.00% 10.00% +0.58%
      Memory bandwidth (read, 16 MB ~ L3) 265,512 MB/sec 108,260 MB/sec 2.45 10.00% 10.00% +9.37%
      PassMark single-thread CPU 3,166 Mops/s 2,365 Mops/s 1.34 10.00% 10.00% +2.97%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 2,278

      Geekbench Multi-Core

      Score: 19,792

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 66342
      Compression
      		 884941
      Encryption
      		 55016
      Extended Instructions
      		 67130
      Floating Point Maths
      		 176895
      Integer Maths
      		 248637
      Physics
      		 7542
      Prime Numbers
      		 324
      Single Threaded
      		 3166
      String Sorting
      		 120670

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2568
      Database Operations
      		 26029
      Memory Latency
      		 69
      Memory Read Cached
      		 28852
      Memory Read Uncached
      		 10457
      Memory Write
      		 15045

      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
      r7iz.large 216 GiB0
      r7iz.xlarge 432 GiB0
      r7iz.2xlarge 864 GiB0
      r7iz.4xlarge 16128 GiB0
      r7iz.8xlarge 32256 GiB0
      r7iz.16xlarge 64512 GiB0
      r7iz.metal-16xl 64512 GiB0

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      r7iz.12xlarge FAQs