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AMD · Data center · GPU

AMD Instinct MI455X

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

VRAM432 GB
Memory technologyHBM4
Form factorEnhanced accelerator module · EAM
InterfaceNot listed
PowerNot listed
Unknown Reference only
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Technical diagrams

Neutral technical reference illustration for AMD Instinct MI455X; 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; not a product photograph

Specifications

FieldValue
ManufacturerAMD
Exact SKUAMD Instinct MI455X
Product familyInstinct
ArchitectureCDNA5
GenerationNot listed
Entity typeGPU
LifecycleUnknown
Launch dateNot listed
VRAM432 GB
Memory technologyHBM4
Memory bandwidth23,300 GB/s
PowerNot listed
InterfaceNot listed
Form factorEnhanced accelerator module · EAM
InterconnectNot listed
MIG / partitioningNot supported
Supported numeric formatsNot listed
Software stackNot listed

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

Confirm framework and precision support before deployment.

Power and cooling

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

Multi-GPU use

No dedicated accelerator interconnect is asserted from the available manufacturer evidence.

Software ecosystem

Use only officially documented drivers and deployment runtimes.

Product timeline

amd-amd-instinct-mi455x

Source details

Official source

Source revision: 7c80f06cf798a95d42186c74d71f7abc0b898d14d93098e11566a6670bfcc2b7

Related models

AMD Instinct MI455X 432 GB · HBM4 Enhanced accelerator module · EAM · Not listed · Not listed AMD Instinct MI8 4 GB · Not listed Not listed · Not listed · Not listed Instinct MI8 4 GB · High Bandwidth Memory (HBM) PCIe® · Add-in card · Not listed · 175 W AMD Instinct MI25 16 GB · Not listed Not listed · Not listed · Not listed AMD Instinct MI50 (16GB) 16 GB · Not listed Not listed · Not listed · Not listed AMD Instinct MI6 16 GB · Not listed Not listed · Not listed · Not listed Instinct MI25 16 GB · HBM2 PCIe® · Add-in card · Not listed · 300 W Instinct MI50 (16GB) 16 GB · HBM2 PCIe® · Add-in card · Not listed · 300 W Instinct MI6 16 GB · GDDR5 PCIe® · Add-in card · Not listed · 150 W AMD Instinct MI100 32 GB · Not listed Not listed · Not listed · Not listed AMD Instinct MI100 32 GB · HBM2 PCIe® · Add-in card · Not listed · 300 W AMD Instinct MI50 (32GB) 32 GB · Not listed Not listed · Not listed · Not listed AMD Instinct MI60 32 GB · Not listed Not listed · Not listed · Not listed Instinct MI50 (32GB) 32 GB · HBM2 PCIe® · Add-in card · Not listed · 300 W Instinct MI60 32 GB · HBM2 PCIe® · Add-in card · Not listed · 300 W AMD Instinct MI210 64 GB · Not listed Not listed · Not listed · Not listed AMD Instinct MI210 64 GB · HBM2e PCIe® · Add-in card · Not listed · Not listed AMD Instinct MI250 128 GB · Not listed Not listed · Not listed · Not listed AMD Instinct MI250 128 GB · HBM2e OAM · Module · Not listed · 500 W AMD Instinct MI250X 128 GB · Not listed Not listed · Not listed · Not listed AMD Instinct MI250X 128 GB · HBM2e OAM · Module · Not listed · 500 W AMD Instinct MI300A 128 GB · Not listed Not listed · Not listed · Not listed AMD Instinct MI300A 128 GB · HBM3 APU SH5 · Socket · Not listed · 550 W AMD Instinct MI350P 144 GB · HBM3E PCIe® · Add-in card · Not listed · Not listed AMD Instinct MI350P 144 GB · Not listed Not listed · Not listed · Not listed AMD Instinct MI300X 192 GB · Not listed Not listed · Not listed · Not listed AMD Instinct MI300X 192 GB · HBM3 OAM · Module · Not listed · Not listed AMD Instinct MI325X 256 GB · Not listed Not listed · Not listed · Not listed AMD Instinct MI325X 256 GB · HBM3E OAM · Module · Not listed · Not listed AMD Instinct MI350X 288 GB · Not listed Not listed · Not listed · Not listed AMD Instinct MI350X 288 GB · HBM3E OAM · Module · Not listed · Not listed AMD Instinct MI355X 288 GB · Not listed Not listed · Not listed · Not listed AMD Instinct MI355X 288 GB · HBM3E OAM · Module · Not listed · Not listed

Official manufacturer source

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

Last verified: 2026-11-04