technology #AI #BizIT #AIChips #AIGPU #AIInfrastructure #Apple #ChatGPT #China #CNBC #CUDA #ExportControls #GenerativeAi #GPU #JensenHuang #LargeLanguageModels #MachineLearning #Microsoft #NVIDIA #Openai #Semiconductors #StockMarket AI mania pushes Nvidia to record $4 trillion valuation Ars Technica 23h ago 2m read