The 45nm quad-core version has 820 million transistors (with a core Die area of 214mm2), which translates to 0.038 million for 1 square millimeter. The 5nm chips produced by TSMC have as many as 170 million transistors per square millimeter. The difference is nearly 45 times. Of course, the number of transistors per unit area of the chip produced by different manufacturers is slightly different. But the overall difference is also tens of times
There are at least four generation gaps 45nm to 28nm generation, 28nm to 14nm - generation, 14nm to 7nm generation, 7nm to 5nm generation.