H20s to China + 15% with Chris Miller and Lennart Heim

Key takeaways

The H20 chip was designed in response to export controls and aimed to maximize performance without breaching regulatory limits.
The Trump administration's ban on the H20 chip demonstrates the fluctuating nature of U.S. tech policy toward China, influenced heavily by trade negotiations.
High-bandwidth memory is becoming increasingly significant in the competitive landscape of AI chips, particularly regarding China's advancement.
Concerns surrounding the sale of advanced chips to China reflect deeper strategic questions about technological competition and national security.
The future of AI and semiconductor technology hinges on ongoing innovation and regulatory strategies that could shape market dynamics for years to come.

Summary

The Introduction of the H20 Chip

In this segment, Leonard Hyam and Chris Miller discuss the introduction of Nvidia's H20 chip in response to export controls in 2023. The chip aimed to operate just below the specified export control limits by optimizing memory bandwidth while retaining high performance. It gained traction in 2024, but the narrative shifts as the Trump administration later banned the chip in April 2025, citing concerns about its capabilities.

The U.S. Policy Flip-Flop

The discussion highlights the dramatic policy change within the U.S. government regarding AI chips sold to China. Initially banned under the Trump administration, the narrative evolves to reveal the dynamics of how and why this reversal occurred. The trade negotiations and national security considerations are central to understanding the shifts in policy. The administration negotiated the terms under which sales could resume, leading to a contentious and strategic dialogue.

Technical Insights on H20 and Competitive Landscape

Leonard and Chris dive toward the technical specs of the H20 chip and comparative performance metrics against its competition, including Huawei's offerings. They discuss implications of high-bandwidth memory, its relevance to China’s tech ecosystem, and the potential market dynamics around AI chip competition. They point out that while the H20 may seem outdated, its performance metrics still give it competitive advantages over many current Chinese alternatives.

The Debate on Exporting to China

The discussion shifts towards the ongoing debate on whether selling advanced AI chips to China helps or hinders U.S. strategic interests. The argument includes perspectives on the necessity to maintain technological superiority, the risks of empowering the Chinese AI ecosystem, and the implications of dependency on U.S. technology. The complexities of geopolitical strategy intertwined with technology emerge as significant themes.

Future Technologies and the H20's Legacy

The conversation wraps up with reflections on the H20 chip's impact on future tech policy and manufacturing. They explore themes of technological advancements, potential chips in development like the downgraded versions of the Blackwell, and ongoing strategies for the U.S. to maintain an edge in the semiconductor race. The discussion prompts considerations for where AI technology is headed globally and the possible shifts in the Asian semiconductor manufacturing landscape.

Show notes

We’re sharing an episode from ChinaTalk that dives into one of the biggest recent reversals in U.S. tech policy.

The U.S. banned Nvidia’s H20 AI chips to China in April. Now, just months later, they’re being sold—with a 15% export fee. What happened? Why the reversal? And what does it mean for the future of AI competition between the U.S. and China?

Chris Miller—author of Chip War—and Lennart Heim from RAND join ChinaTalk host Jordan Schneider to unpack the policy flip-flop, why China is publicly downplaying interest in the H20, and why high-bandwidth memory and semiconductor manufacturing tools may be even more important than the Nvidia chips themselves.

Resources:

Listen to more from ChinaTalk: https://link.chtbl.com/chinatalk

Check out the Horizon Fellowship to work in DC on emerging tech policy issues like AI chip export controls: https://horizonpublicservice.org/applications-open-for-2026-horizon-fellowship-cohort/

Outro Music: It's a Shame, The Spinners, 1970

Stay Updated:

Find a16z on YouTube: YouTube

Find a16z on X

Find a16z on LinkedIn

Listen to the a16z Show on Spotify

Listen to the a16z Show on Apple Podcasts

Follow our host: https://twitter.com/eriktorenberg

Please note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures.

Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.