SiFive, a chip design firm established in 2015 by UC Berkeley engineers behind an open-source architecture, has closed a $400 million oversubscribed funding round. This investment values the company at $3.65 billion, marking a significant milestone in the competitive semiconductor landscape.
The round was spearheaded by Atreides Management, a firm founded by former Fidelity investor Gavin Baker. Atreides Management previously participated in Cerebras Systems’ $1 billion funding event. Other notable investors include Apollo Global Management, D1 Capital Partners, Point72 Turion, T. Rowe Price Sutter Hill Ventures, and various venture capital, private equity, and hedge funds.
Nvidia’s involvement as an investor adds a strategic layer to this deal. SiFive’s RISC-V open chip design diverges from the dominant Intel x86 and ARM architectures that currently support Nvidia’s GPU-driven AI infrastructure. By backing SiFive, Nvidia is exploring an alternative CPU technology that could complement its existing ecosystem.
SiFive operates on a licensing model reminiscent of Arm’s historical approach. The company provides chip designs for clients to customize and implement, rather than manufacturing chips directly. In March, Arm shifted its strategy by launching its first proprietary AI chip, developed in collaboration with Meta and targeting customers like OpenAI, Cerebras, and Cloudflare.
This funding round represents SiFive’s first major capital raise since March 2022, when it secured $175 million led by Coatue Management at a pre-money valuation of $2.33 billion. Previous investors in that round included Intel Capital, Qualcomm Ventures, and Aramco Ventures, according to Pitchbook estimates.
RISC-V technology has traditionally been associated with embedded systems and smaller-scale applications. With this new injection of capital and Nvidia’s endorsement, SiFive is poised to expand into the high-stakes arena of AI data center CPUs. The company’s designs are engineered to integrate with Nvidia’s CUDA software and NVLink Fusion, a rack server system that facilitates connectivity between various CPUs and Nvidia’s AI infrastructure.
As Intel and AMD intensify their efforts to challenge Nvidia’s GPU dominance, Nvidia’s investment in an 11-year-old startup underscores a strategic pivot. SiFive offers an open, neutral chip design framework that is not tethered to proprietary technologies or specific customer dependencies. This move could reshape competitive dynamics in the AI hardware sector.
