---
type: "Topics"
locale: "en"
url: "https://longbridge.com/en/dolphin/post/44299943.md"
description: "AWS paired its in-house AI chip Trainium (Trn) with a proprietary interconnect protocol called NeuronLink, positioned against NVLink. Why is its core still the generic PCIe standard?Because AWS does not plan to develop its own switch chips for inter-die data forwarding. Custom interconnects typically need such chips, so it is unlikely to move away from PCIe. Looking ahead, AWS may instead become a purchaser of UALink, the open interconnect standard formed by AMD and others. The latest NeuronLink is built on PCIe Gen6 and delivers 2,304 GB/s bidirectional bandwidth per card. Nvidia and AMD's new schemes reach 3.6 TB/s, about 1.6x AWS.A scale-up interconnect must address three issues: line rate, error handling, and the set of cross-chip operations. The most critical is the first, the per-lane rate, which is determined by the SerDes. Nvidia's in-house SerDes reaches 200G, and AMD, using Broadcom silicon, also reaches 200G. PCIe Gen6 is only 64G, roughly one-third of that. To make up bandwidth, either wait for PCIe to speed up in future gens or add more lanes.$Amazon(AMZN.US) https://longbridge.com/zh-CN/dolphin/post/44283715?channel=OWNN00110"
datetime: "2026-10-13T07:18:20.000Z"
locales:
  - [en](https://longbridge.com/en/dolphin/post/44299943.md)
  - [zh-CN](https://longbridge.com/zh-CN/dolphin/post/44299943.md)
  - [zh-HK](https://longbridge.com/zh-HK/dolphin/post/44299943.md)
author: "[Dolphin Research](https://longbridge.com/en/dolphin.md)"
generator: "portal-rs"
---

# AWS paired its in-house AI chip Trainium (Trn) wit…


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## Comments (3)

- **KaiSiang · 2026-10-13T22:18:29.000Z**: Nice one
  - **Dolphin fans** (2026-10-14T03:03:29.000Z): 🤝🤝
- **NewUser_X · 2026-10-13T21:57:11.000Z**: 👍


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> **Disclaimer: This article is for reference only and does not constitute any investment advice.**