x8i.12xlarge by Amazon Web Services

x8i.12xlarge is a Memory intensive [Intel processors] Gen8 12xlarge server offered by Amazon Web Services with 48 vCPUs, 768 GiB of memory and 0 GB of storage. The pricing starts at 0.5989 USD per hour.
48 vCPU
768 GiB Memory
Spare SCore
51,909
(All-cores)
2,122
(Single-core)

Specifications

Server Metadata

Vendor ID
aws
Name
x8i.12xlarge
Description
Memory intensive [Intel processors] Gen8 12xlarge
Family
x8i
Hw Virt
Status
active
Observed At
2026-10-28T23:25:16.793420

Availability

REGION / IDSPOTONDEMAND
Oregon (US) / us-west-2
1.46335 USD/h 5.2519 USD/h
Ohio (US) / us-east-2
1.1321 USD/h 5.2519 USD/h
Northern Virgina (US) / us-east-1
1.76662 USD/h 5.2519 USD/h
Mumbai (IN) / ap-south-1
1.29975 USD/h 5.4187 USD/h
Stockholm (SE) / eu-north-1
0.5989 USD/h 5.9894 USD/h
Aragón (ES) / eu-south-2
1.6386 USD/h 6.3024 USD/h
Dublin (IE) / eu-west-1
2.389067 USD/h 6.3024 USD/h
Milan (IT) / eu-south-1
0.808767 USD/h 6.6154 USD/h
Paris (FR) / eu-west-3
1.059833 USD/h 6.6173 USD/h
(MY) / ap-southeast-5
0.6854 USD/h 6.8539 USD/h
Frankfurt (DE) / eu-central-1
2.025667 USD/h 7.3529 USD/h
Seoul (KR) / ap-northeast-2
0.7615 USD/h 7.6154 USD/h
Tokyo (JP) / ap-northeast-1
1.07715 USD/h 7.6154 USD/h
Sydney (AU) / ap-southeast-2
1.154667 USD/h 7.6154 USD/h
Singapore (SG) / ap-southeast-1
2.637367 USD/h 7.6154 USD/h
Sao Paulo (BR) / sa-east-1
1.5645 USD/h 10.2415 USD/h

Processor

vCPUs
48
Hypervisor
nitro
CPU Allocation
Dedicated
CPU Cores
24
CPU Speed
3.9 GHz
CPU Architecture
x86_64
CPU Manufacturer
Intel
CPU Family
Xeon
CPU Model
6975P-C
CPU L1D Cache
48 KiB
CPU L1D Cache Total
1 MiB
CPU L1I Cache
64 KiB
CPU L1I Cache Total
2 MiB
CPU L2 Cache
2 MiB
CPU L2 Cache Total
48 MiB
CPU L3 Cache
480 MiB
CPU L3 Cache Total
480 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, pdcm, pcid, sse4_1, sse4_2, x2apic, movbe, popcnt, tsc_deadline_timer, aes, xsave, avx, f16c, rdrand, hypervisor, lahf_lm, abm, 3dnowprefetch, cpuid_fault, ssbd, ibrs, ibpb, stibp, ibrs_enhanced, 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, wbnoinvd, ida, arat, avx512vbmi, umip, pku, ospke, waitpkg, avx512_vbmi2, gfni, vaes, vpclmulqdq, avx512_vnni, avx512_bitalg, tme, avx512_vpopcntdq, rdpid, bus_lock_detect, cldemote, movdiri, movdir64b, md_clear, serialize, amx_bf16, avx512_fp16, amx_tile, amx_int8, flush_l1d, arch_capabilities
Ecpus
24.5
Scalability
51.04

System Resources and Accelerators

MEMORY
Memory Amount
768 GiB
Memory Amount Actual
768 GiB
Memory Generation
DDR5
Memory Speed
7200 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
      22.5 Gbps
      Network Speed Max
      22.5 Gbps
      Network Storage Speed Baseline
      15 Gbps
      Network Storage Speed Max
      15 Gbps
      Inbound Traffic
      0 GB/month
      Outbound Traffic
      0 GB/month
      IPv4
      0

      CPU and System Topology

      Server Description

      A memory-optimized x86_64 platform featuring 768 GB of high-speed DDR5 RAM and dedicated Intel Xeon processing for memory-intensive enterprise workloads.

      Memory OptimizedGeneral Purpose

      Amazon Web Services x8i.12xlarge is a memory-optimized instance featuring 48 dedicated vCPUs and 768.0 GB of DDR5 RAM, powered by an Intel Xeon 6975P-C processor running at 3.9 GHz. Built on the Nitro hypervisor, this x86_64 server provides a high memory-to-core ratio of 16.0 GB per vCPU but does not include local storage. It delivers a baseline network bandwidth of 22 Gbps. Benchmark results indicate strong performance across database operations, with a PassMark database score of 22611.51 and 90.13 million operations per second in Redis SET tests. The processor's Advanced Matrix Extensions support strong prompt processing speeds for language models, though text generation for large models remains average. This instance is suited for memory-intensive enterprise applications, large databases, and memory-bound data processing tasks.

      Economics

      Average Price per Region

      Prices per Zone

      Lowest Prices

      Performance

      Workload Profiles

      3.7Score
      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) 10,713,490 ops/sec 1,919,289 ops/sec 5.8 50.00% 50.00% +140.00%
      Redis RPS (pipeline=16, SET) 59,484,636 ops/sec 11,728,058 ops/sec 4.9 20.00% 20.00% +37.00%
      PassMark Memory Mark (composite) 2,649 2,416 1.1 10.00% 10.00% +0.96%
      Memory bandwidth (read, 16 MB ~ L3) 215,383 MB/sec 108,466 MB/sec 2 10.00% 10.00% +7.20%
      PassMark single-thread CPU 3,274 Mops/s 2,365 Mops/s 1.4 10.00% 10.00% +3.40%

      Memory Bandwidth

      Compression

      OpenSSL

      Geekbench Single-Core

      Score: 2,173

      Geekbench Multi-Core

      Score: 19,574

      Passmark CPU Scores

      BENCHMARKSCORE
      Mark
      		 69,148
      Compression
      		 956,222
      Encryption
      		 54,500
      Extended Instructions
      		 67,635
      Floating Point Maths
      		 179,329
      Integer Maths
      		 247,680
      Physics
      		 8,033
      Prime Numbers
      		 477
      Single Threaded
      		 3,274
      String Sorting
      		 124,423

      Passmark Memory Scores

      BENCHMARKSCORE
      Memory Mark
      		 2,649
      Database Operations
      		 22,612
      Memory Latency
      		 70
      Memory Read Cached
      		 28,561
      Memory Read Uncached
      		 15,483
      Memory Write
      		 11,216

      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
      x8i.large 232 GiB0
      x8i.xlarge 464 GiB0
      x8i.2xlarge 8128 GiB0
      x8i.4xlarge 16256 GiB0
      x8i.8xlarge 32512 GiB0
      x8i.16xlarge 641024 GiB0
      x8i.24xlarge 961536 GiB0

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      x8i.12xlarge FAQs