1-Architecture and Software Description
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.
2- Compatibility
32-bit operating systems (OS) and applications require 32-bit CPUs
3- Memory Limits
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.
4- ProsFewer issues, more widely compatible
5- Cons
Less RAM access, less memory, less efficiency, fewer securityfeatures
64-bit :
1-Architecture and Software Description
64-bit architecture is based on registers, address or data buses64 bits (8 octets) wide. For software, 64-bit means code use with64-bit virtual memory addresses.
2- Compatibility
64-bit OS requires 64-bit CPU, and 64-bit applications need a 64-bit OS and CPU
3- Memory Limits
64-bit systems allow up to 17 Billion GB of RAM.
4- Pros
• More RAM access • More efficiency• More virtual memory allocation
• More security features
5- Cons
• Possible driver compatibility • Some motherboard RAM limits
• Legacy issues
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How to check server 32 or 64 bit?
#getconf LONG_BIT
or
#uname -m
or
#file /sbin/init
How to check server cpu information ?
#cat/proc/cpuinfo
or
#lscpu
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