Difference between 32-bit and 64-bit

When we talk about bits, we talk about binary digits. 1 Bit is a unit or information in computing which has a value of 0 or 1. In this post I explain the difference between a 32-bit and a 64-bit system. Having a 32-bit system means that you need to have a 32-bit processor, buses and have to be using 32-bit software, but there are also ways to compute different bits with certain tools.

The bits show the width of the data buses, address buses and registers in a system, which means that 64-bit is wider than 32-bit. A 32-bit register can hold up to 2³² values and the same is with the 64-bit registers, which makes 2⁶⁴ different values.


The difference table

	32-bit	64-bit
Storage (values)	232	264
Maximum memory (theoretically)	4 GB	16 TB
Speed	Slower	Faster
Usage today	Less	More common

Compatibility table

	32-bit CPU	64-bit CPU
32-bit OS & 32-bit Application	YES	YES
32-bit OS & 64-bit Application	NO	NO
64-bit OS & 64-bit Application	NO	YES
64-bit OS & 32-bit Application	NO	YES

Where do we need the difference

Mostly 64-bit systems are needed where efficiency and speed is needed. You don't have to have 64-bit system for browsing the web or chatting with your friends. Workstations, servers and hardcore gamers - they must have 64-bit systems in order to achieve better results in what they're doing.

How to find out which one do you have

64-bit Windows operating systems have 2 "Program files" folders:

1. \Program Files  -  stores 64-bit programs
2. \Program Files (x86)  -  stores 32-bit programs

Control Panel -> System and Security -> System