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r5b.2xlarge by Amazon Web Services

r5b.2xlarge is a Memory optimized Gen5 2xlarge server offered by Amazon Web Services with 8 vCPUs, 64 GiB of memory and 0 GB of storage. The pricing starts at 0.1759 USD per hour.
8 vCPU
64 GiB Memory
Spare SCore
6757
(All-cores)
1282
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
r5b.2xlarge
Description
Memory optimized Gen5 2xlarge
Family
r5b
Hw Virt
Status
active
Observed At
2026-08-10T09:33:22.078180

Availability

REGION / IDSPOTONDEMAND
Ohio (US) / us-east-2
0.217333 USD/h 0.596 USD/h
Oregon (US) / us-west-2
0.261067 USD/h 0.596 USD/h
Northern Virgina (US) / us-east-1
0.2821 USD/h 0.596 USD/h
Stockholm (SE) / eu-north-1
0.3314 USD/h 0.6318 USD/h
Quebec (CA) / ca-central-1
0.336933 USD/h 0.652 USD/h
Dublin (IE) / eu-west-1
0.299833 USD/h 0.668 USD/h
Milan (IT) / eu-south-1
0.199067 USD/h 0.7 USD/h
London (GB) / eu-west-2
0.332567 USD/h 0.7 USD/h
Seoul (KR) / ap-northeast-2
0.242267 USD/h 0.712 USD/h
Singapore (SG) / ap-southeast-1
0.281033 USD/h 0.712 USD/h
Frankfurt (DE) / eu-central-1
0.295233 USD/h 0.712 USD/h
Tokyo (JP) / ap-northeast-1
0.239133 USD/h 0.724 USD/h
Sydney (AU) / ap-southeast-2
0.3022 USD/h 0.724 USD/h
Sao Paulo (BR) / sa-east-1
0.2822 USD/h 0.948 USD/h

Processor

vCPUs
8
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
4
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
128 KiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
128 KiB
CPU L2 Cache
1 MiB
CPU L2 Cache Total
4 MiB
CPU L3 Cache
36 MiB
CPU L3 Cache Total
36 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, aperfmperf, tsc_known_freq, pni, pclmulqdq, 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
5.3
Scalability
132.5

System Resources and Accelerators

MEMORY
Memory Amount
64 GiB
Memory Amount Actual
64 GiB
Memory Generation
DDR4
Memory Speed
3200 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
      2.5 Gbps
      Network Speed Max
      10 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 virtual server featuring a high RAM-to-vCPU ratio and dedicated Intel Xeon processors for memory-intensive workloads.

      Memory OptimizedGeneral Purpose

      Amazon Web Services r5b.2xlarge is a memory-optimized instance featuring 8 dedicated vCPUs and 64.0 GB of DDR4 RAM, running on an Intel Xeon 8259CL processor at 3.1 GHz. Built on the Nitro hypervisor with an x86_64 architecture, this instance provides a high memory-to-core ratio of 8.0 GB per core but lacks local storage and GPU acceleration. Performance benchmarks indicate average multi-core capabilities, with a Passmark CPU score of 7687.13 and Redis SET performance of 6.89 million operations per second, contrasted by weaker single-core performance. The instance offers a baseline network bandwidth of 2 Gbps. It is qualitatively cost-efficient for memory-intensive applications that do not demand high single-threaded compute. The r5b.2xlarge is well-suited for workloads such as in-memory caching, database operations, and general memory-bound enterprise applications.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      0.441Score
      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) 703,879 ops/sec 1,910,660 ops/sec 0.368 50.00% 50.00% -39.30%
      Redis RPS (pipeline=16, SET) 4,448,608 ops/sec 11,608,287 ops/sec 0.383 20.00% 20.00% -17.50%
      PassMark Memory Mark (composite) 2,069 2,416 0.856 10.00% 10.00% -1.54%
      Memory bandwidth (read, 16 MB ~ L3) 45,768 MB/sec 107,896 MB/sec 0.424 10.00% 10.00% -8.22%
      PassMark single-thread CPU 1,815 Mops/s 2,364 Mops/s 0.768 10.00% 10.00% -2.61%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 1,116

      Geekbench Multi-Core

      Score: 4,225

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 7687
      Compression
      		 100377
      Encryption
      		 3124
      Extended Instructions
      		 6019
      Floating Point Maths
      		 12142
      Integer Maths
      		 22631
      Physics
      		 871
      Prime Numbers
      		 48
      Single Threaded
      		 1815
      String Sorting
      		 11831

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2069
      Database Operations
      		 2586
      Memory Latency
      		 62
      Memory Read Cached
      		 21900
      Memory Read Uncached
      		 8606
      Memory Write
      		 7934

      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.4xlarge 16128 GiB0
      r5b.8xlarge 32256 GiB0
      r5b.12xlarge 48384 GiB0
      r5b.16xlarge 64512 GiB0
      r5b.24xlarge 96768 GiB0

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      r5b.2xlarge FAQs