# AMD Instinct MI455X GPU Detailed for Rack-Scale AI Deployments

DevFeed: [AMD Instinct MI455X GPU Detailed for Rack-Scale AI Deployments](<https://devfeed.tech/articles/amd-s-instinct-mi455x-aiming-for-the-sun-13987.md>)

Original publisher: [Read original article](<https://chipsandcheese.com/p/amds-instinct-mi455x-aiming-for-the>)

Author: George Cozma

Published: 2026-07-23T17:37:10Z

Content type: article

Language: en

Sources: [Chips and Cheese](<https://devfeed.tech/sources/chips-and-cheese.md>)

Topics: [GPU](<https://devfeed.tech/topics/gpu.md>), [Artificial Intelligence](<https://devfeed.tech/topics/ai.md>), [networking](<https://devfeed.tech/topics/networking.md>), [NVLink](<https://devfeed.tech/topics/nvlink.md>), [systems](<https://devfeed.tech/topics/systems.md>), [Ethernet](<https://devfeed.tech/topics/ethernet.md>), [SOC](<https://devfeed.tech/topics/soc.md>), [tsmc](<https://devfeed.tech/topics/tsmc.md>)

Tags: [2026](<https://devfeed.tech/tags/2026.md>), [ai](<https://devfeed.tech/tags/ai.md>), [architecture](<https://devfeed.tech/tags/architecture.md>), [article](<https://devfeed.tech/tags/article.md>), [capacity](<https://devfeed.tech/tags/capacity.md>), [communication](<https://devfeed.tech/tags/communication.md>), [compute](<https://devfeed.tech/tags/compute.md>), [ethernet](<https://devfeed.tech/tags/ethernet.md>), [gpu](<https://devfeed.tech/tags/gpu.md>), [memory](<https://devfeed.tech/tags/memory.md>), [networking](<https://devfeed.tech/tags/networking.md>), [performance](<https://devfeed.tech/tags/performance.md>), [processors](<https://devfeed.tech/tags/processors.md>), [scale](<https://devfeed.tech/tags/scale.md>), [soc](<https://devfeed.tech/tags/soc.md>), [tsmc](<https://devfeed.tech/tags/tsmc.md>)

## AI overview

The article examines AMD's Instinct MI455X, a CDNA5 GPU designed for rack-scale AI deployments. It describes the Helios rack-scale system, UALink over Ethernet networking, compute and memory specifications, and changes to the WGP, register-file, and matrix-unit designs.

## Source excerpt

Editor's Note (7/25/2026): The article has been edited with more information about the L2 behavior along with the bandwidth of the die to die interface.