Solved

The Difference between 32 bit and 64 bit Architecture and Application Support

Posted on 2010-11-10
5
556 Views
Last Modified: 2012-05-10
Hi,
I'm posting this question to get clear understanding of the 64 bit Architecture of the Computer.
Its because i'm so confused.

What's the difference between 32 bit and 64 bit architecture?.

I have seen some applications , those are indicated on CD that supports only 32 bit but still works on 64 bit architecture?..I don't understand how is that.

There is two system32 folder in 64 bit architecture..Why is that?..

Thanks for your answer in Advance.
0
Comment
Question by:sivakugan
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
5 Comments
 
LVL 14

Accepted Solution

by:
leoahmad earned 500 total points
ID: 34103666
The  term "32-bit," when referring to a processor or operating system  architecture, refers to the maximum size of an integer register a  processor can store. A 32-bit architecture can store data which is 32  bits wide, while a 64-bit architecture can store data which is 64 bits  wide. 64-bit architecture can simply store more bits than 32-bit  architecture.                                     

The  ability to store more bits means that a processor with a 64-bit  architecture can, when paired with a 64-bit operating system, address  more memory than a 32-bit architecture. A processor with a 32-bit  architecture can only address four gigabytes of memory. The same goes  for a 32-bit operating system, even if you have a 64-bit processor. The  maximum memory that can be addressed with a 64-bit architecture is 16  terabytes.

Programs  created only for a 32-bit architecture or operating system won't always  work on a 64-bit version, and vice versa. This is because the 32-bit  and 64-bit operating systems store data in different ways. Most modern  programs offer compatibility for both, but attempting to run a program  which was built for a 32-bit version of Windows XP on a modern 64-bit  version of Windows 7 may cause the program to crash. Also, device  drivers are not compatible between 32-bit and 64-bit versions.


0
 
LVL 14

Expert Comment

by:leoahmad
ID: 34103688

The 64-bit operating systems have two System32 folders. The  C:\WINDOWS\System32 directory contains the 64-bit libraries (such as  kernel32.dll). However there is a new directory called  C:\WINDOWS\SysWow64, which contains the exact same files as System32,  but their 32-bit partners. The SYSWOW64 service in Windows will  automatically map programs to the right version.
So if a 32-bit program attempts to load  "C:\WINDOWS\System32\kernel32.dll", SYSWOW64 will automatically behind  the scenes redirect you to C:\WINDOWS\SysWow64.
0
 
LVL 3

Expert Comment

by:nlandas
ID: 34103706
0
 
LVL 5

Expert Comment

by:sabk
ID: 34103847
0
 

Author Closing Comment

by:sivakugan
ID: 34133050
Good Answer
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

No matter the version of Windows you are using, you may have some problems with Windows Search running too slow or possibly not running at all. Before jumping into how you can solve this issue, just know there are many other viable alternative deskt…
There are many software programs on offer that will claim to magically speed up your computer. The best advice I can give you is to avoid them like the plague, because they will often cause far more problems than they solve. Try some of these "do it…
How to Install VMware Tools in Red Hat Enterprise Linux 6.4 (RHEL 6.4) Step-by-Step Tutorial
Finding and deleting duplicate (picture) files can be a time consuming task. My wife and I, our three kids and their families all share one dilemma: Managing our pictures. Between desktops, laptops, phones, tablets, and cameras; over the last decade…

738 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question