The terms 32-bit and 64-bit refer to the way a computer’s processor (also called a CPU), handles information.
The 64-bit versions of Windows can utilize more memory than 32-bit versions of Windows.
By using 32 bits your processor can represent numbers from 0 to 4,294,967,295 while a 64-bit machine can represent numbers from 0 to 18,446,744,073,709,551,615.
64 bit  [...]