How many transister are used in core i7?

The number of transistors in an Intel Core i7 processor varies by generation and specific model, but generally, a modern Core i7 CPU contains around 19 to 20 million transistors per square millimeter. For example, the 10th generation Intel Core i7-10700K has approximately 19.2 million transistors per mm², resulting in a total transistor count of around 19 million to 30 million transistors, depending on the specific architecture and features.