# Nvidia opens NVLink Fusion, and pays $2B to keep the fabric its own
> NVLink licensed to third-party CPUs and accelerators (MediaTek, Marvell, Astera, Lightmatter); a $2B Marvell stake reads as a toll booth, not an investment

**Meta:** type: story · date: 2026-03-31 · heads: 谁的钱, 悄然的转变 · 8 takes · 3 lenses · 3 regions

## Summary

[Nvidia](/zh/entity/nvidia) is countering the open-fabric push with controlled openness. **NVLink Fusion** licenses its scale-up interconnect to third-party CPUs and accelerators, partners include [MediaTek](/zh/entity/mediatek), [Marvell](/zh/entity/marvell), Alchip, [Astera Labs](/zh/entity/astera-labs), Synopsys, Cadence and photonics startup [Lightmatter](/zh/entity/lightmatter), letting custom silicon attach to Nvidia's rack-scale stack (Vera CPUs, ConnectX, BlueField, Spectrum-X) via NVLink-C2C chiplets. On 31 March 2026 Nvidia put **$2B into Marvell**, which will supply custom XPUs and Fusion-compatible networking. Critics read the stake as "a toll booth, not an investment": rivals' chips may join, but only on Nvidia's interconnect, a defensive move against open [UALink](/zh/n/ualink-2-0-specs-2026) and [Ultra Ethernet](/zh/n/ultra-ethernet-1-0-2026).

## By the numbers

- $2B, Nvidia's investment in Marvell (announced 31 March 2026).
- 7+, named Fusion silicon partners (MediaTek, Marvell, Alchip, Astera Labs, Synopsys, Cadence, Lightmatter).
- C2C, NVLink chip-to-chip path extending the fabric to custom dies.
- 2, open rivals it answers (UALink scale-up, Ultra Ethernet scale-out).

## Why it matters

Whoever owns the scale-up fabric owns where the next decade's AI margin pools. By letting partners' silicon plug into NVLink rather than defect to UALink, Nvidia keeps the interconnect, and its standards gravity, proprietary while appearing open. The Marvell cash binds a would-be open-fabric supplier into the Nvidia orbit.

## What to watch

- Whether Fusion partners also ship UALink/UEC parts or commit to Nvidia's fabric.
- Antitrust/lock-in scrutiny of the Marvell stake and Fusion licensing terms.
- Lightmatter's optical NVLink as the photonics-interconnect wildcard.

## Regional takes (batched by bias / lens)

### unlabelled
- **Nvidia Newsroom** (United States, en) — Nvidia's own announcement of Marvell joining the NVLink Fusion ecosystem, Marvell to supply custom XPUs and NVLink Fusion-compatible scale-up networking, with Nvidia providing Vera CPUs, ConnectX NICs, BlueField DPUs and Spectrum-X switches, the primary record for the partnership and a $2B investment.
  Source: https://nvidianews.nvidia.com/news/nvidia-ai-ecosystem-expands-as-marvell-joins-forces-through-nvlink-fusion
- **Igor's Lab** (Germany, en) — 
  Source: https://www.igorslab.de/en/nvidia-is-investing-2-billion-in-marvell-and-opening-up-nvlink-fusion-for-semi-custom-ai-infrastructure/
- **Marvell Investor Relations** (United States, en) — 
  Source: https://investor.marvell.com/news-events/press-releases/detail/1019/nvidia-ai-ecosystem-expands-as-marvell-joins-forces-through-nvlink-fusion
- **Lightmatter** (United States, en) — 
  Source: https://lightmatter.co/press-release/lightmatter-joins-nvidia-nvlink-fusion/
- **Nvidia Newsroom (launch)** (United States, en) — 
  Source: https://nvidianews.nvidia.com/news/nvidia-nvlink-fusion-semi-custom-ai-infrastructure-partner-ecosystem
- **FinancialContent** (United States, en) — 
  Source: https://markets.financialcontent.com/stocks/article/marketminute-2026-3-31-nvidias-2-billion-bet-on-marvell-the-birth-of-the-nvlink-fusion-era

### tech-business scepticism
- **The Next Web** (Netherlands, en) — Argues Nvidia's $2B in Marvell 'is not an investment, it is a toll booth', opening NVLink Fusion lets rivals' custom silicon plug into Nvidia's fabric, but on Nvidia's interconnect, deepening lock-in rather than loosening it. Reads it as a defensive answer to open UALink and Ultra Ethernet.
  > "Nvidia's $2 billion Marvell bet is not an investment, it is a toll booth: rivals' chips may join, but only on Nvidia's fabric."
  Source: https://thenextweb.com/news/nvidia-marvell-nvlink-fusion-ecosystem-lock-in

### data-centre hardware deep-dive
- **ServeTheHome** (United States, en) — Details NVLink Fusion and NVLink-C2C extending the interconnect to third-party CPUs and accelerators via chiplets, naming MediaTek, Marvell, Alchip, Astera Labs, Synopsys and Cadence, framing it as Nvidia letting custom silicon attach to its rack-scale stack to blunt the appeal of fully open fabrics.
  > "NVLink Fusion brings NVLink to third-party CPUs and accelerators via chiplets, MediaTek, Marvell, Alchip, Astera Labs, Synopsys and Cadence are in."
  Source: https://www.servethehome.com/nvidia-announces-nvlink-fusion-bringing-nvlink-to-third-party-cpus-and-accelerators/

## Across the graph
- Related: [[ualink-2-0-specs-2026]], [[ultra-ethernet-1-0-2026]], [[nvidia-spectrum-x-photonics-cpo-2026]], [[arm-agi-server-cpu-2026]]
- Entities: Nvidia, Marvell, Mediatek, Astera Labs, Lightmatter, United States

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Canonical: https://rbtfl.xyz/zh/n/nvlink-fusion-marvell-2026