r5b.24xlarge by Amazon Web Services

r5b.24xlarge is a Memory optimized Gen5 24xlarge server offered by Amazon Web Services with 96 vCPUs, 768 GiB of memory and 0 GB of storage. The pricing starts at 1.0253 USD per hour.
96 vCPU
768 GiB Memory
Spare SCore
81,317
(All-cores)
1,384
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
r5b.24xlarge
Description
Memory optimized Gen5 24xlarge
Family
r5b
Hw Virt
Status
active
Observed At
2026-10-08T17:40:43.539618

Availability

REGION / IDSPOTONDEMAND
Ohio (US) / us-east-2
3.377033 USD/h 7.152 USD/h
Northern Virgina (US) / us-east-1
3.095025 USD/h 7.152 USD/h
Oregon (US) / us-west-2
3.8538 USD/h 7.152 USD/h
Stockholm (SE) / eu-north-1
1.03545 USD/h 7.5811 USD/h
Quebec (CA) / ca-central-1
2.2199 USD/h 7.824 USD/h
Dublin (IE) / eu-west-1
3.078267 USD/h 8.016 USD/h
Milan (IT) / eu-south-1
2.1816 USD/h 8.4 USD/h
London (GB) / eu-west-2
3.718633 USD/h 8.4 USD/h
Frankfurt (DE) / eu-central-1
2.656333 USD/h 8.544 USD/h
Seoul (KR) / ap-northeast-2
3.024367 USD/h 8.544 USD/h
Singapore (SG) / ap-southeast-1
3.666833 USD/h 8.544 USD/h
Tokyo (JP) / ap-northeast-1
1.780167 USD/h 8.688 USD/h
Sydney (AU) / ap-southeast-2
2.710167 USD/h 8.688 USD/h
Sao Paulo (BR) / sa-east-1
4.914333 USD/h 11.376 USD/h

Processor

vCPUs
96
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
48
CPU Speed
3.1 GHz
CPU Architecture
x86_64
CPU Manufacturer
Intel
CPU Family
Xeon
CPU Model
8259CL
CPU L1D Cache
32 KiB
CPU L1D Cache Total
2 MiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
2 MiB
CPU L2 Cache
1 MiB
CPU L2 Cache Total
48 MiB
CPU L3 Cache
36 MiB
CPU L3 Cache Total
72 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, pcid, sse4_1, sse4_2, x2apic, movbe, popcnt, tsc_deadline_timer, aes, xsave, avx, f16c, rdrand, hypervisor, lahf_lm, abm, 3dnowprefetch, pti, fsgsbase, tsc_adjust, bmi1, avx2, smep, bmi2, erms, invpcid, mpx, avx512f, avx512dq, rdseed, adx, smap, clflushopt, clwb, avx512cd, avx512bw, avx512vl, xsaveopt, xsavec, xgetbv1, xsaves, ida, arat, pku, ospke, avx512_vnni
Ecpus
58.7
Scalability
61.15

System Resources and Accelerators

MEMORY
Memory Amount
768 GiB
Memory Amount Actual
768 GiB
Memory Generation
DDR4
Memory Speed
2666 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
      60 Gbps
      Network Storage Speed Max
      60 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      Server Description

      A memory-optimized x86 server featuring high-capacity DDR4 RAM and strong multi-core processing for demanding database and caching workloads.

      Memory OptimizedGeneral Purpose

      Amazon Web Services r5b.24xlarge is a memory-optimized instance built on the AWS Nitro hypervisor. Powered by an Intel Xeon 8259CL x86_64 processor running at 3.1 GHz, it delivers 96 vCPUs and 768.0 GB of DDR4 memory. The instance lacks local storage and GPU accelerators but provides a baseline network bandwidth of 25 Gbps. Benchmarks highlight strong multi-core performance and exceptional memory bandwidth, particularly in large-block uncached read and write operations, alongside high-throughput Redis SET execution. Conversely, single-core performance and LLM text generation speeds are relatively weak. Given its high memory density and robust multi-threaded capabilities, this instance is highly suited for memory-intensive workloads, including large-scale databases, in-memory caching, and complex software compilation.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      2.7Score
      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) 7,768,186 ops/sec 2,029,678 ops/sec 3.9 50.00% 50.00% +97.00%
      Redis RPS (pipeline=16, SET) 44,334,012 ops/sec 12,408,146 ops/sec 3.7 20.00% 20.00% +30.00%
      PassMark Memory Mark (composite) 2,641 2,417 1.1 10.00% 10.00% +0.96%
      Memory bandwidth (read, 16 MB ~ L3) 229,366 MB/sec 108,374 MB/sec 2.1 10.00% 10.00% +7.70%
      PassMark single-thread CPU 1,956 Mops/s 2,365 Mops/s 0.83 10.00% 10.00% -1.80%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 1,255

      Geekbench Multi-Core

      Score: 11,969

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 55855
      Compression
      		 1186094
      Encryption
      		 37109
      Extended Instructions
      		 74204
      Floating Point Maths
      		 145908
      Integer Maths
      		 272544
      Physics
      		 5150
      Prime Numbers
      		 347
      Single Threaded
      		 1956
      String Sorting
      		 136952

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2641
      Database Operations
      		 21640
      Memory Latency
      		 53
      Memory Read Cached
      		 23509
      Memory Read Uncached
      		 9846
      Memory Write
      		 9682

      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
      r5b.large 216 GiB0
      r5b.xlarge 432 GiB0
      r5b.2xlarge 864 GiB0
      r5b.4xlarge 16128 GiB0
      r5b.8xlarge 32256 GiB0
      r5b.12xlarge 48384 GiB0
      r5b.16xlarge 64512 GiB0

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      r5b.24xlarge FAQs