What is the extra fact that you found out about hardware?

I believe you are asking for fun facts about the CPU? Anyway, a few off the top of my head:

32 bit CPUs can only process 32 bits of data per cycle (64 bits can process 64 bits per cycle likewise). Fortunately most CPUs today clock over 2 billion cycles per second (2GHz). Some can do double that but they are very expensive.

CPUs can only do simple arithmetic operations, such as add, subtract, and move data. Multiplication and division is too complex and take multiple steps inside the Arithmetic Logic Unit (part of the CPU... it's very complicated).