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r8a.8xlarge by Amazon Web Services

r8a.8xlarge is a Memory optimized [AMD processors] Gen8 8xlarge server offered by Amazon Web Services with 32 vCPUs, 256 GiB of memory and 0 GB of storage. The pricing starts at 0.5053 USD per hour.
32 vCPU
256 GiB Memory
Spare SCore
120212
(All-cores)
3763
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
r8a.8xlarge
Description
Memory optimized [AMD processors] Gen8 8xlarge
Family
r8a
Hw Virt
Status
active
Observed At
2026-07-26T21:29:48.897076

Availability

REGION / IDSPOTONDEMAND
Northern Virgina (US) / us-east-1
0.85918 USD/h 2.5562 USD/h
Ohio (US) / us-east-2
0.815033 USD/h 2.5562 USD/h
Oregon (US) / us-west-2
0.9809 USD/h 2.5562 USD/h
Aragón (ES) / eu-south-2
0.577667 USD/h 2.8603 USD/h
Dublin (IE) / eu-west-1
1.2414 USD/h 2.8603 USD/h
Tokyo (JP) / ap-northeast-1
0.919033 USD/h 3.0835 USD/h
Frankfurt (DE) / eu-central-1
1.0475 USD/h 3.0835 USD/h

Processor

vCPUs
32
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
32
CPU Speed
4.5 GHz
CPU Architecture
x86_64
CPU Manufacturer
AMD
CPU Family
EPYC
CPU Model
9R45
CPU L1D Cache
48 KiB
CPU L1D Cache Total
2 MiB
CPU L1I Cache
32 KiB
CPU L1I Cache Total
1 MiB
CPU L2 Cache
1 MiB
CPU L2 Cache Total
32 MiB
CPU L3 Cache
32 MiB
CPU L3 Cache Total
128 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, ht, syscall, nx, mmxext, fxsr_opt, pdpe1gb, rdtscp, lm, constant_tsc, rep_good, nopl, xtopology, nonstop_tsc, cpuid, extd_apicid, aperfmperf, tsc_known_freq, pni, pclmulqdq, monitor, ssse3, fma, cx16, pcid, sse4_1, sse4_2, x2apic, movbe, popcnt, aes, xsave, avx, f16c, rdrand, hypervisor, lahf_lm, cmp_legacy, cr8_legacy, abm, sse4a, misalignsse, 3dnowprefetch, topoext, perfctr_core, ssbd, perfmon_v2, ibrs, ibpb, stibp, ibrs_enhanced, vmmcall, 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, clzero, xsaveerptr, rdpru, wbnoinvd, arat, avx512vbmi, pku, ospke, avx512_vbmi2, gfni, vaes, vpclmulqdq, avx512_vnni, avx512_bitalg, avx512_vpopcntdq, rdpid, movdiri, movdir64b, fsrm, avx512_vp2intersect, flush_l1d
Ecpus
31.9
Scalability
99.69

System Resources and Accelerators

MEMORY
Memory Amount
256 GiB
Memory Amount Actual
256 GiB
Memory Generation
DDR5
Memory Speed
6400 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
      15 Gbps
      Network Speed Max
      15 Gbps
      Network Storage Speed Baseline
      10 Gbps
      Network Storage Speed Max
      10 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      Server Description

      A memory-optimized x86_64 platform featuring dedicated AMD EPYC processors and DDR5 memory for database and memory-intensive workloads.

      Memory OptimizedGeneral Purpose

      Amazon Web Services r8a.8xlarge is a memory-optimized instance featuring 32 dedicated physical cores powered by an AMD EPYC 9R45 processor running at 4.5 GHz. Built on the Nitro hypervisor, it provides 256.0 GB of DDR5 memory at 6 GHz, establishing an 8.0 GB per core ratio. The instance lacks local storage and dedicated GPUs, relying on a 15 Gbps baseline network bandwidth. Benchmark results place the server in the top 10% for Geekbench single-core and multi-core scores, software compilation, and Passmark database operations, while memory bandwidth tests fall in the top 25%. Conversely, the Passmark memory score is in the middle 50%. This hardware profile is suited for memory-intensive workloads, database operations, software compilation, and medium-scale LLM inference, offering a high-density memory configuration without the added cost of local storage.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      4.22Score
      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) 11,785,708 ops/sec 1,896,415 ops/sec 6.21 50.00% 50.00% +149.00%
      Redis RPS (pipeline=16, SET) 77,095,188 ops/sec 11,539,523 ops/sec 6.68 20.00% 20.00% +46.20%
      PassMark Memory Mark (composite) 2,692 2,411 1.12 10.00% 10.00% +1.14%
      Memory bandwidth (read, 16 MB ~ L3) 256,362 MB/sec 107,368 MB/sec 2.39 10.00% 10.00% +9.10%
      PassMark single-thread CPU 3,800 Mops/s 2,363 Mops/s 1.61 10.00% 10.00% +4.88%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 2,834

      Geekbench Multi-Core

      Score: 27,850

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 78538
      Compression
      		 1017530
      Encryption
      		 50450
      Extended Instructions
      		 90182
      Floating Point Maths
      		 242616
      Integer Maths
      		 242567
      Physics
      		 11710
      Prime Numbers
      		 868
      Single Threaded
      		 3800
      String Sorting
      		 137035

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2692
      Database Operations
      		 41052
      Memory Latency
      		 91
      Memory Read Cached
      		 33901
      Memory Read Uncached
      		 32625
      Memory Write
      		 33019

      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
      r8a.medium 18 GiB0
      r8a.large 216 GiB0
      r8a.xlarge 432 GiB0
      r8a.2xlarge 864 GiB0
      r8a.4xlarge 16128 GiB0
      r8a.12xlarge 48384 GiB0
      r8a.16xlarge 64512 GiB0

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      r8a.8xlarge FAQs