As copper can no longer keep up with the data movement demands of AI clusters, Marvell answers with its Photonic Fabric optical platform. This is not just a speed upgrade, but an architectural shift that breaks through the memory wall and the power bottleneck.

At FMS 2026 Marvell unveiled a trio of memory products, and the market read it as another wave of AI launches. Put them in the context of four acquisitions, though, and the real play is owning the entire "data movement layer" — memory is just the first toll. We break down the map, the moat and the supply chain positioning.

Why did Marvell pay up for Celestial AI? The answer is the SiPh interposer, which turns the PIC into an active interposer between GPU and HBM: the endgame architecture for scale-up CPO. Lightmatter runs an independent track, and neither uses TSMC. Part 4 of the series unpacks this underrated long-term axis.

Marvell's $3.25B Celestial AI deal is not another CPO startup buy. What it really paid for is Photonic Fabric, which brings light into the center of the die and breaks the memory wall: a ticket to whatever replaces copper inside the package.