r5b.24xlarge by Amazon Web Services
(All-cores)
(Single-core)
Specifications
Server Metadata
Vendor ID | aws |
Name | r5b.24xlarge |
Description | Memory optimized Gen5 24xlarge |
Family | r5b |
Hw Virt | |
Status | active |
Observed At | 2026-06-25T07:31:05.881394 |
Availability
| REGION / ID | SPOT | ONDEMAND |
|---|---|---|
Northern Virgina (US) / us-east-1 | 4.511275 USD/h | 7.152 USD/h |
Ohio (US) / us-east-2 | 4.4729 USD/h | 7.152 USD/h |
Oregon (US) / us-west-2 | 5.671267 USD/h | 7.152 USD/h |
Stockholm (SE) / eu-north-1 | 2.30435 USD/h | 7.5811 USD/h |
Quebec (CA) / ca-central-1 | 2.187333 USD/h | 7.824 USD/h |
Dublin (IE) / eu-west-1 | 3.034833 USD/h | 8.016 USD/h |
Milan (IT) / eu-south-1 | 2.0268 USD/h | 8.4 USD/h |
London (GB) / eu-west-2 | 4.097967 USD/h | 8.4 USD/h |
Singapore (SG) / ap-southeast-1 | 2.930733 USD/h | 8.544 USD/h |
Frankfurt (DE) / eu-central-1 | 3.439767 USD/h | 8.544 USD/h |
Seoul (KR) / ap-northeast-2 | 3.914633 USD/h | 8.544 USD/h |
Tokyo (JP) / ap-northeast-1 | 2.605367 USD/h | 8.688 USD/h |
Sydney (AU) / ap-southeast-2 | 3.533333 USD/h | 8.688 USD/h |
Sao Paulo (BR) / sa-east-1 | 6.2687 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 | 122.29 |
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_64 platform featuring 768 GB of RAM and 96 vCPUs for high-throughput multi-core workloads and caching.
Amazon Web Services r5b.24xlarge is a memory-optimized server instance utilizing the Nitro hypervisor and an Intel Xeon 8259CL x86_64 processor. It delivers 96 vCPUs across 48 physical cores at 3.1 GHz, paired with 768.0 GB of DDR4 memory. The instance lacks local storage and GPUs, relying on a 25 Gbps baseline network bandwidth. Performance benchmarks highlight a significant contrast: single-core metrics, such as stress-ng single-core and gzip compression, rank in the bottom 25%, whereas multi-core capabilities and memory bandwidth across both small and large blocks rank in the top 25%. Redis SET operations and static web serving throughput also perform in the top 25%. Given these characteristics, the r5b.24xlarge is suited for memory-intensive, highly parallel workloads such as large-scale database operations, caching layers, and multi-threaded data processing, though it is less efficient for single-threaded tasks or LLM text generation.
Economics
Performance
Memory Bandwidth
Compression
OpenSSL
Geekbench Single-Core
Geekbench Multi-Core
Passmark CPU Scores
| BENCHMARK | SCORE |
|---|---|
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
| BENCHMARK | SCORE |
|---|---|
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
| INSTANCE | vCPUs | MEMORY | GPUs |
|---|---|---|---|
| r5b.large | 2 | 16 GiB | 0 |
| r5b.xlarge | 4 | 32 GiB | 0 |
| r5b.2xlarge | 8 | 64 GiB | 0 |
| r5b.4xlarge | 16 | 128 GiB | 0 |
| r5b.8xlarge | 32 | 256 GiB | 0 |
| r5b.12xlarge | 48 | 384 GiB | 0 |
| r5b.16xlarge | 64 | 512 GiB | 0 |
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