It is kind of confusing and sometimes hard to tell if you need a 32 bit or 64 bit processor.
A 32 bit computer cannot run a 64 bit version of an Operating system.
Difference between 32 bit and 64 bit computers
A 64 bit computer run faster than a 32 bit computer; This is because a 64 bit can perform more calculations per second compared to 32 bit.
A Computer with 64 bit processor can run either 32 or 64 bit version of operating system.