The U.S. government plans to restrict the sale of advanced AI chips to China in the coming weeks, the Commerce Department announced Tuesday. KeyBanc Capital Markets said Tuesday that the new restrictions are a negative for Nvidia, arguing "it will ultimately be difficult to backfill China demand." The A800 and H800 are modified versions of Nvidia's cutting-edge AI chips used in data centers, known as the A100 and the more recent H100. To comply with the new rules, Nvidia created the A800 and H800 chips, which had slower data-transfer speeds and therefore didn't violate the export controls. The latest export controls, which U.S. officials said will go into effect in 30 days, again threaten those sales.

---

Persons: Biden, chipmaker –, Jeff Marks, Marks, — CNBC's Kristina Partsinevelos, Jim Cramer's, Jim Cramer, Jim, Justin Sullivan Organizations: Nvidia, Commerce Department, KeyBanc, Markets, Microsoft, Oracle, U.S, supercomputing, Intel, Devices, CNBC, NVIDIA Locations: China, U.S, Santa Clara , California