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Difference between 32 bit and 64 bit architecture ?

32 bit architecture 64 bit architecture
32-bit architecture is based on registers, address
or data buses 32 bits (4 octets) wide.For software,
32-bit typically means use of 32-bit linear address space.		 64-bit architecture is based on registers, address or data buses 64 bits (8 octets) wide. For software, 64-bit means code use with 64-bit virtual memory addresses.
32-bit systems are limited to 3.2
Gigabytes (GB) of RAM 32 bit Windows
with address limitation do not attain to a full 4GB.
It’s hardware dependent, typically 3.25GB.		 64-bit systems allow up to 17 Billion GB of RAM.
A computer 32-bit processor cannot have
a 64-bit version of an operating system installed.
An operating system installed only have a 32-bit version.		 64-bit processor in a computer can be access to 64-bit or 32-bit version of an operating system to be installed.
Less RAM access, less memory,
less efficiency, fewer security features		 More RAM access ,More efficiency ,
More virtual memory allocation , More security features
32-bit operating systems (OS) and
applications required as 32-bit CPUs.		 64-bit OS requires 64-bit CPU, and 64-bit applications.
Fewer Issues Legacy issues
All editions of Windows 8, Windows 7, Windows Vista,
and Windows XP, Linux are the available system
for 32 bit processor.		 XP Professional, Windows Vista, Windows 7, Windows 8, as well as Mac OS X and Linux are the available systems for 64 bit processor.
Difference between 32 bit and 64 bit architecture
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