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AMD · Data center · Enhanced accelerator module

AMD Instinct MI455X 432GB

Exact MI455X reference specifications and AI deployment guidance, separated from FusionPointAI commercial inventory.

VRAM432 GB
Memory technologyHBM4
Form factorAMD · Accelerator · Module
InterfaceAMD platform interface
PowerNot listed
Current Reference only
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Technical diagrams

Neutral technical reference illustration for AMD Instinct MI455X 432GB; not a product photograph
Reference illustration; consult the verified specification table for exact hardware identity. This is not a product photograph. FusionPointAI neutral GPU reference illustration
Neutral technical reference illustration for AMD Instinct MI455X 432GB; not a product photograph

Specifications

FieldValue
ManufacturerAMD
Exact SKUMI455X
Product familyAMD MI455X
ArchitectureCDNA 5
GenerationInstinct MI400
Entity typeEnhanced accelerator module
LifecycleCurrent
Launch dateNot listed
VRAM432 GB
Memory technologyHBM4
Memory bandwidth23,300 GB/s
PowerNot listed
InterfaceAMD platform interface
Form factorAMD · Accelerator · Module
InterconnectInfinity Fabric
MIG / partitioningNot supported
Supported numeric formatsFP64, FP32, BF16, FP16, FP8, FP6, FP4, INT8
Software stackrocm

AI workload suitability

LLM inference

High memory capacity supports large checkpoints and multi-GPU inference when runtime and topology are certified.

Fine-tuning and training

Designed for sustained accelerator workloads; training suitability depends on interconnect, precision and cluster topology.

Image, video and embeddings

FP16 acceleration supports common generative and vector workloads within the listed VRAM envelope.

Power and cooling

The manufacturer does not publish a directly comparable board-power value for this entity.

Multi-GPU use

Infinity Fabric is the recorded interconnect path; topology must still be validated at node level.

Software ecosystem

rocm

Product timeline

amd-mi455x-432gb

Source details

Official source

Source revision: 7688f88012de4c7d651f2a3b3f87b37fbc961be65ed0790b73a60b6984359482

Technical diagrams

This is not a product photograph.

Technical deployment reference for AMD Instinct MI455X 432GB; not a product photograph
Reference deployment illustration; the primary verified image shows the exact physical product.This is not a product photograph. FusionPointAI GPU memory topology reference
Reference deployment illustration; the primary verified image shows the exact physical product.
Technical deployment reference for AMD Instinct MI455X 432GB; not a product photograph

Related models

AMD Instinct MI455X 432GB 432 GB · HBM4 AMD · Accelerator · Module · AMD platform interface · Not listed

Official manufacturer source

https://www.amd.com/en/products/accelerators/instinct/mi400/mi455x.html

Last verified: 2026-08-24