最新报道:Nvidia and AMD face a 15% drop in US stock prices after the Biden administration imposed new restrictions on AI chip sales to China. The rules, effective immediately, limit exports of advanced semiconductors to prevent military use. Nvidia's A800 and H800 chips, previously modified for Chinese markets, are now banned. Analysts warn this could cost Nvidia $5B in annual sales. Both companies are assessing long-term impacts while exploring compliant products for China. The move escalates US-China tech tensions, with China vowing to protect its interests. Semiconductor stocks across Asia also fell in response.