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 0.1028 USD per hour.
8 vCPU
64 GiB Memory
Spare SCore
6,757
(All-cores)
1,282
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
r5b.2xlarge
Description
Memory optimized Gen5 2xlarge
Family
r5b
Hw Virt
Status
active
Observed At
2026-11-07T23:34:13.912112

Availability

REGION / IDSPOTONDEMAND
Ohio (US) / us-east-2
0.2326 USD/h 0.596 USD/h
Northern Virgina (US) / us-east-1
0.279475 USD/h 0.596 USD/h
Oregon (US) / us-west-2
0.270767 USD/h 0.596 USD/h
Stockholm (SE) / eu-north-1
0.16855 USD/h 0.6318 USD/h
Quebec (CA) / ca-central-1
0.353733 USD/h 0.652 USD/h
Dublin (IE) / eu-west-1
0.296667 USD/h 0.668 USD/h
Milan (IT) / eu-south-1
0.1866 USD/h 0.7 USD/h
London (GB) / eu-west-2
0.2925 USD/h 0.7 USD/h
Seoul (KR) / ap-northeast-2
0.229867 USD/h 0.712 USD/h
Singapore (SG) / ap-southeast-1
0.285733 USD/h 0.712 USD/h
Frankfurt (DE) / eu-central-1
0.293433 USD/h 0.712 USD/h
Tokyo (JP) / ap-northeast-1
0.232567 USD/h 0.724 USD/h
Sydney (AU) / ap-southeast-2
0.304267 USD/h 0.724 USD/h
Sao Paulo (BR) / sa-east-1
0.156 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
66.25

System Resources and Accelerators

MEMORY
Memory Amount
64 GiB
Memory Amount Actual
64 GiB
Memory Generation
DDR4
Memory Speed
3200 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
      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

      0.44Score
      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 1,922,940 ops/sec 0.37 50.00% 50.00% -39.00%
      Redis RPS (pipeline=16, SET) 4,448,608 ops/sec 11,797,257 ops/sec 0.37 20.00% 20.00% -18.00%
      PassMark Memory Mark (composite) 2,069 2,406 0.88 10.00% 10.00% -1.30%
      Memory bandwidth (read, 16 MB ~ L3) 45,768 MB/sec 108,657 MB/sec 0.42 10.00% 10.00% -8.30%
      PassMark single-thread CPU 1,815 Mops/s 2,365 Mops/s 0.75 10.00% 10.00% -2.80%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 1,116

      Geekbench Multi-Core

      Score: 4,225

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 7,687
      Compression
      		 100,377
      Encryption
      		 3,124
      Extended Instructions
      		 6,019
      Floating Point Maths
      		 12,142
      Integer Maths
      		 22,631
      Physics
      		 871
      Prime Numbers
      		 48
      Single Threaded
      		 1,815
      String Sorting
      		 11,831

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2,069
      Database Operations
      		 2,586
      Memory Latency
      		 62
      Memory Read Cached
      		 21,900
      Memory Read Uncached
      		 8,606
      Memory Write
      		 7,934

      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
      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