Or,
"NVIDIA announced Monday that it will invest up to $500 billion over the next four years to build artificial intelligence (AI) infrastructure in the United States. " This reporting and the Fortune article indicate that Nvidia will spend $500 billion to build products for sale. That reads as if the $500 billion will be the cost, to Nvidia, of goods to be sold for a larger number.
My number on the CHIPS Act was $280 billion. According to your comments, that is the correct amount of money the government will invest because of the CHIPS Act.
As for the other figures you refer to, they would be great if they happen. Your source is a year-old
study that
forecasts those results but, as you point out, only $450 billion in investment had been announced.