Sunnyvale-based fabless semiconductor startup Bolt Graphics announced on October 13, 2026, that it has achieved silicon bring-up of its Zeus test chip and opened a new office in Taipei as it prepares for production of its first fully commercial GPU, which is planned for general availability in 2028.

A Test Chip That Exceeded Expectations

The Zeus test chip, fabricated on TSMC's 12nm process, accelerates electromagnetic simulation and path tracing in both software and hardware, enabling full-product simulation without physical prototypes.

The 6 sq mm chip was brought up within 24 hours. Bolt powered on and tested the A0 silicon with no functional issues, performing tests across a temperature range of -40°C to 85°C.

The chip runs at 1.4 watts, compared with 35 watts for the FPGA prototyping platform it replaces, exceeding the company's internal performance and efficiency estimates. The initial tape-out of the test chip was completed in April.

According to Bolt, the Zeus test chip is the first commercial GPU architecture with dedicated electromagnetic simulation hardware. The company says this addresses the performance, accuracy, and memory limits that historically prevented CPU- and GPU-based software from simulating complete products.

Bolt also stated it has proven that highly complex physics algorithms can be executed using fixed-function hardware, which it says accelerates the training of advanced robotics and world models.

"Electromagnetics is our starting point, and the goal is to let users accurately simulate anything in the world by building a complete physics simulation solution," said Darwesh Singh, Founder and CEO of Bolt Graphics. "For years, engineers have had to choose between simulating individual components or building a physical prototype of complete products. Running Maxwell's equations on our silicon eliminates that tradeoff."

Targeting Simulation Beyond Electromagnetics

Bolt argues that general-purpose CPU and GPU constraints limit electromagnetic simulation, computational fluid dynamics, and molecular dynamics.

The company aims to accelerate all three workloads, allowing engineers and scientists to accurately simulate and render highly complex parts and products, as well as train robots and world models. The company cites applications including silicon photonics development and research into new materials, optics, and stealth geometries.

To mark the test chip success, Bolt will host invited guests at its Sunnyvale headquarters in California on October 13.

Taipei Office to Support Production Ramp

The new Taipei office, located at Taipei Nanshan Plaza, brings Bolt's team closer to suppliers as the company prepares its flagship Zeus GPU for volume production. The office already has team members in place, and Bolt plans to scale headcount there rapidly to deliver production silicon.

"Building production silicon takes close coordination with our partners," said Lawrence Lee, VP, Manufacturing Operations at Bolt Graphics. "Having our team in Taipei puts us beside our key suppliers, allowing us to keep a pulse on the progress and move faster while ensuring quality is maintained throughout development."

Road to the Zeus GPU

Bolt said it was selective in choosing its production process node, TSMC's N5P, to avoid competing for wafer allocation. With the technology now validated in silicon, the company is strengthening relationships with partners as customers anticipate access to Zeus.

The company expects to open developer access in the first quarter of 2027, with initial Zeus GPU availability for Early Access Program customers planned for late 2027. Volume production of PCIe cards and servers is expected to follow in 2028.

About the Company

Bolt Graphics describes itself as building a next-generation compute platform designed to dramatically improve cost efficiency across high-performance computing, rendering, and emerging workloads.

By optimizing for performance-per-dollar, the company says it unlocks new applications and aims to become a foundational layer for the future of compute.

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