AI Accelerator Cluster & Frontier Model Scaling Modeler

Evaluate semiconductor throughput, High Bandwidth Memory (HBM) ceilings, scale-out network fabric chokepoints, and cluster power requirements for training frontier LLMs.

Architecture Scenarios:
Effective MFU 42.8% Model FLOPs Utilization
Training Run Duration 38.4 d 922 continuous hours
Total Compute Demand 28.8 ZF 28.8 ZettaFLOPs (10ยฒยน OP)
Cluster Power Envelope 11.0 MW 10,138 MWh total energy

Cluster Interconnect Fabric & Bottleneck Radar

Real-time simulation of compute execution, AllReduce gradient sync, and MoE All-to-All token dispatch.
Compute Bound (Optimal)
Step Time Allocation Breakdown Compute: 58% | Network Sync: 32% | Memory Stall: 10%
๐ŸŸฉ Matrix Tensor Math (GEMM) ๐ŸŸง Distributed Collective Comms ๐ŸŸฅ Memory Bandwidth Saturation

Hardware & Distributed Partitioning 3D Parallelism

Total Peak Cluster Throughput 10.65 EFLOPS
Effective Sustained Throughput 4.56 EFLOPS
Cluster Aggregate HBM Memory 1.57 Petabytes
Total Model Memory Footprint (Weights+Opt) 6.40 Terabytes
Arithmetic Intensity (FLOP/Byte) 270.8 FLOP/B
Interconnect Bisection Bandwidth 3.28 Terabits/s

Economics & Operational Feasibility

Estimated Cluster Server Hardware CapEx $262.1 Million
Network Switching & Optical Transceivers $39.3 Million
Estimated Electricity Cost (@$0.08/kWh) $811,040
COโ‚‚ Equivalent Emissions (@400g/kWh) 4,055 Metric Tons
Domestic Parity Multiple vs Frontier 1.48ร— Chip Scale Required
Primary Scaling Chokepoint Interconnect Bisection
Model verified: cluster operational within thermal and fabric limits.

The AI Semiconductor Sovereign Race

When cloud hyperscalers like Alibaba unveil new custom AI silicon (such as the T-Head Hanguang series and specialized server platforms), the strategic objective is dual: reducing reliance on sanctioned global supply chains (e.g. H100/B200 export curbs) while engineering bespoke matrix architectures optimized for internal large model workloads.

Hardware parity is not simply about raw FLOPs; it is defined by the three-way balance between arithmetic execution, high-bandwidth memory (HBM3e/HBM2e) packaging, and ultra-dense scale-out optical interconnect.

Why Interconnect Dictates Model FLOPs Utilization (MFU)

At cluster scales exceeding 16,000 accelerators, raw compute is rarely the bottleneck. Distributed 3D parallelism (Tensor, Pipeline, and Data Parallelism with ZeRO-3/FSDP) requires massive collective communications:

  • AllReduce / ReduceScatter: Synchronizes model gradients across data-parallel ranks.
  • All-to-All Token Routing: In Mixture-of-Experts (MoE) architectures, tokens must be dispatched across specialized expert nodes within milliseconds.
  • Scale-out Bandwidth: Without 800+ Gbps bisection bandwidth and low tail latency, MFU drops below 30%, multiplying cluster power and training time.

How to Interpret This Modeler

This workbench utilizes the validated Chinchilla training law ($FLOPs \approx 6 \times \text{Parameters} \times \text{Tokens}$) combined with the Roofline Memory and LogGP Network Distributed Scaling models.

Adjust the sliders to test whether adding domestic accelerators overcomes lower per-chip TFLOPS, or whether interconnect fabric constraints create diminishing returns that require architectural revisions.

Assigned training arithmetic differs from a real cluster run

Read the explanation

The saved model assigns four hundred billion parameters and twelve trillion tokens. Dense training operations are six times parameters times tokens, or two point eight eight times ten to the twenty five. Choosing mixture of experts with eighty five billion active parameters uses twenty one point two five percent of the dense operation count, leaving seventy eight point seven five percent outside this formula. At three pixels per percent dense one hundred measures three hundred, active twenty one point two five sixty three point seven five and difference seventy eight point seven five two hundred thirty six point two five. These are assigned arithmetic assumptions, not executed training, measured sparse dispatch or real model quality. The canvas draws eight illustrative racks and six spines regardless of the sixteen thousand three hundred eighty four chip setting. Memory uses total parameters even in the active-parameter compute case. Four hundred billion times two bytes gives point eight decimal terabytes of weights. Ten additional bytes per parameter gives four terabytes of optimizer states; total four point eight. At sixty pixels per terabyte weights span forty eight pixels, optimizer two hundred forty and combined two hundred eighty eight. Adjacent segments show both components using the same decimal units. The aggregate HBM formula instead divides chip count times gigabytes by one thousand twenty four squared and calls the result petabytes, mixing binary-style conversion with the decimal memory estimate. No actual allocation, optimizer state or out-of-memory test is performed. The source never validates whether a training configuration fits real hardware. Initial PUE is one point two two. Changing it to one point four and clicking reset leaves it at one point four: reset invokes the Alibaba preset, which never sets PUE. At one hundred pixels per PUE unit initial one point two two measures one hundred twenty two, retained one point four one hundred forty and difference point one eight eighteen. That reset also changes the initial four hundred gigabit network choice to six hundred, rather than restoring every original field. Resource metrics multiply assigned chip power, twenty five percent host overhead, PUE and estimated duration. Native controls, positive canvas buffers and actual JSON and text exports describe these local settings, not current vendor specifications, real cluster utilization, electricity bills, carbon measurements or a comparative model benchmark. Preserve the original reset scope and check the downloaded configuration.

Enjoy this tool? Build your own with Super