Refers to processors where integers and other data are stored in 32-bit registers. This has been the dominant processor architecture for a while, only recently being superseded by 64-bit operating systems.

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277
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18answers
96k views

If 32-bit machines can only handle numbers up to 2^32, why can I write 1000000000000 (trillion) without my machine crashing?

32 bit computers can only store signed integers up to 232 - 1. This is why we have run out of ipv4 addresses and have entered the 64 bit era. However, the number 232 - 1 (2,147,483,647) is not as ...
136
votes
19answers
22k views

32-bit vs. 64-bit systems

What are the differences between 32-bit and 64-bit systems? If you have used both of them, what kind of sharp differences have you experienced? Would it be a problem to use 32-bit programs on ...
74
votes
4answers
57k views

Can a 32-bit OS machine use up all 8GB RAM + 20GB page file?

What I understand about 32-bit OS is, the address is expressed in 32 bits, so at most the OS could use 232 = 4G memory space -- I assume the unit is bytes, so 4GB. Does this mean if any machine with ...
52
votes
10answers
63k views

Quick way to tell if an installed application is 64-bit or 32-bit

I've got a third-party application (in this case Cognos Data Manager) installed on 64-bit Windows Server 2003. Is there a quick way to determine if an application has been built/compiled as a 64-bit ...
52
votes
0answers
7k views

32 vs 64 bits… what's the big deal?

Why is it considered to be such a big deal to have a 64-bit computer? Why does it "change everything?" Why do applications need to be designed differently between 32- and 64-bit platforms? And, on ...
46
votes
8answers
16k views

Why does Windows only show about 3.5 GB of my more than 4 GB of RAM?

I recently upgraded my computer's RAM to 4 GB. My 32-bit Windows installation shows only 3574 MB of the memory. How can I make Windows use the full amount of RAM?
36
votes
1answer
2k views

Do 64bit software/applications require more RAM than their 32bit counterparts?

I just saw these minimum requirements for a game: Memory: 2GB for 32-bit OS or 4GB for 64-bit OS Why does the 64bit OS require more RAM than its 32bit counterpart?
29
votes
8answers
14k views

Is there any benefit from installing Windows 7 64-bit when you have less than 4GB or RAM?

I've recently purchased Windows 7 Ultimate. I have an AMD Athlon64 X2 5000+ with 2GB DDR2 RAM. I know RAM has gotten much cheaper, I know, I know, but I am not going to be able to upgrade my RAM for ...
24
votes
5answers
18k views

How to check if a binary is 32 or 64 bit on Windows?

So, I need to do just that before I move the program to 32bit machine and experience a spectacular failure. Is there an easy way to do this?
17
votes
9answers
53k views

Is there way to enable 4 GB RAM in 32-bit Windows OS?

I upgraded my PC to 4 GB RAM and I get only 3 GB. Windows 7 32-Bit consider that I've 4 GB RAM but didn't use more than 3 GB. Someone told me that MS Windows 32-bit doesn't support RAM larger than 3 ...
17
votes
3answers
499 views

Is there a significant limitation on useable software on a 64-bit Windows machine?

I have a 32-bit laptop that I've had for like two years. I'm getting a new one now, and I'm now noticing that lots of laptops come with Windows 7 64-bit. I've always heard that it's harder to find ...
15
votes
8answers
1k views

Should I choose 32 or 64 bit for Linux?

I own a Linux workstation which currently has 4 GB of RAM and planning to go for 8 GB in the near future. CPU is a Core2Quad Q9550. Should I install a 32 or 64 bit variant of Linux?
14
votes
2answers
228 views

Are 64-bit processors “faster” than 32-bit ones, simply because they are 64-bits? [duplicate]

I have pondered that some say "32-bit is old news" because you are limited in RAM without cutting around, such as with PAE. Assuming first that the following factors weigh in on the processor's speed ...
12
votes
3answers
18k views

Can a 32 bit OS run in a 64 bit processor?

What's the difference between 32 bit OS and 64 bit OS? Can a 32 bit OS run in a 64 bit processor?
12
votes
6answers
3k views

What is the difference between 64-bit and 32-bit Operating systems? [duplicate]

Possible Duplicate: 32-bit vs. 64-bit systems I know that there are 2 types of OSs, 64 bit and 32 bit What is the main differences between them? And if I am buying a new laptop, which one ...
12
votes
3answers
11k views

Is my install 32 or 64bit?

I'm trying to find out if my Ubuntu install is 32 or 64bit. The best I can find is "i686" does this mean its 32 bit? Whats the correct way of finding out if the Ubuntu installed on my laptop is 32 ...
12
votes
1answer
11k views

How can I run a 32-bit app on 64-bit OSX 10.7.2?

I have an app that only exists a 32bit version. In order to use it, I used to press 2 & 3 together before booting the Mac, so it'll run in 32bit mode. However, some apps (64bit version that ...
12
votes
1answer
11k views

Is my Windows 7 x86 license key valid for a x64 installation of Windows? [duplicate]

Possible Duplicate: When reinstalling Windows 7, does the language, version, architecture (64-bit or 32-bit) or source (OEM, retail, or MSDN) matter? I've just got a new laptop with Windows ...
11
votes
8answers
2k views

Pros and cons of 64bit vs 32bit Windows

What are the advantages and disadvantages of the two types of system? I know that 64bit allows more RAM then the 3-and-a-bit used by 32bit, but what other differences would you expect to see? I am ...
11
votes
3answers
25k views

Upgrade Ubuntu from 32 to 64 bit edition

Is there a way to upgrade my 32-bit version of Ubuntu to 64-bit version? I use Ubuntu 9.10. If there is no simple way, what if I simply copy my home and /etc directories to new installation, will it ...
10
votes
3answers
3k views

What is meant by a 32 bit processor?

What is meant by a 32 bit processor, or generally an n-bit processor?
10
votes
3answers
2k views

Why can't Windows 7 64 bit run 32 bit programs?

From what I understand of it, the architecture hasn't changed as much as it did from 16 bit to 32 bit so why do we need XP mode and the like to run 32 bit apps in Windows 7 64 bit? Or have I ...
10
votes
5answers
19k views

How to check whether my OS is 64-bit or 32-bit?

What is the best way to determine whether my OS is 64-bit or 32-bit ? Assume that, I directly on some os & I am going to install a software on it. But how to determine, whether OS is 32-bit or ...
9
votes
4answers
35k views

Is x86 32 bit or 64 bit?

I have a copy of Windows in MSDNAA and it says Windows Vista x86. Is this Windows Vista 32 bit, or 64 bit?
9
votes
7answers
11k views

Detect Windows Server version 32/64-bit in CLI

What's the best and quickest way to detect whether you're running a 32 or 64-bit version of Windows Server from the command line? (Cygwin is installed)
9
votes
7answers
5k views

How to tell if a computer has a 64-bit CPU or OS

How you can check if your computer Has an x86 (32-bit) or x86-64 (64-bit) processor? Is running a 32 bit or 64 bit operating system?
9
votes
10answers
28k views

8GB RAM on XP Professional

I recently installed 8GB of RAM onto a quad core workstation (HP xw8600) running Windows XP Pro (32-bit). I added the /PAE switch in the boot.ini file, but the SysInfo is saying 3GB total memory ...
9
votes
6answers
2k views

3GB RAM Installed and Detected by BIOS, Windows Vista 32bit Only Sees 2GB

I am attempting to install more RAM on a Windows Vista 32bit machine which is using a X6DAL-XG motherboard and the RAM amount reported in the BIOS is 3GB+, but Windows is only reporting 2GB installed. ...
9
votes
2answers
386 views

Why different processes see different instances of the System32 folder?

I am running Windows 8 Enterprise x64. I logged on using an account from the Administrators group. When I open Windows Explorer or a command prompt, then I can see the file cdd.dll: ...
9
votes
5answers
2k views

Can I install windows 7 x64 in a VPC where the host is vista x86?

Before I waste my time trying is this possible? If not, i'll just install win 7 x86 on the VPC.
8
votes
3answers
10k views

How do I know if my linux kernel is running in 32bit or 64bit?

When I do a cat in /proc/cpuinfo it shows a line with clflushsize : 64 Does this mean my kernel is running in 64 bits?
8
votes
6answers
6k views

Does Snow Leopard provide Java 6 for 32-bit machines?

There has been some speculation that Apple's Snow Leopard would finally include a version of Java 6 that works on 32-bit Intel hardware. Now that the OS has been released, can anybody confirm whether ...
8
votes
4answers
8k views

Linux command to return number of bits (32 or 64)?

What is a Linux command that I can run to programmatically return either 32 or 64 to indicate whether the processor is a 32 bit or 64 bit processor?
8
votes
3answers
6k views

32 bit or 64 bit OS on a 512 mb VPS?

I am planning to rent a VPS service with following basic specification: 512mb of RAM 1 CPU 20gb HDD (4gb of it is swap) Ubuntu 10.10 server I am able to choose between a 32 bit or 64 bit install ...
8
votes
5answers
36k views

Different PATH environment variable for 32bit and 64bit Windows - is it possible?

Is it possible to have whole or part of PATH environment variable specific to the type of running process's image (32bit/64bit)? When I run some app from within 64bit cmd.exe I would like to have it ...
8
votes
6answers
25k views

Windows 7 Ultimate 32 bit to 64 bit [duplicate]

Possible Duplicate: When reinstalling Windows 7 or Vista, does the language, version, architecture (64-bit or 32-bit) or source (OEM, retail, or MSDN) matter? I have a Windows 7 Ultimate 32 ...
7
votes
9answers
12k views

For a PC with 1GB RAM, should I install 32 Bit or 64 Bit Windows 7?

I would like to install Windows 7 Ultimate on a PC with 1GB of RAM. What's better for me? The 32 or 64-bit version?
7
votes
7answers
6k views

How can I find out whether my Windows is 32bit or 64 bit?

How can I find out whether my install of Windows (specifically XP and Vista) is either 32 or 64 bit? Additionally, how can I find out if my hardware will support a 64 bit operating system?
7
votes
7answers
10k views

Merging “Program Files” and “Program Files (x86)” folders in Windows 7 64-bit

Windows 7 64-bit version installs 32-bit programs to Program Files (x86) folder, and 64-bit programs to Program Files folder. Of course, Microsoft must have a reason for doing that, but as a user I ...
7
votes
2answers
355 views

When should I put programs in “Program Files” and when “Program Files (x86)”?

I'm using Vista, and installers often choose one of the two "Program Files" folders (regular or (x86).) When I have the choice (i.e., there is no installer) how should I choose? Does it ever matter? ...
7
votes
5answers
4k views

64 bit OS and VPN software

I am using 64 bit Vista but as a consultant I find it very frustrating when clients use proprietary(Cisco usually) VPN software that will only work with a 32 bit OS. I am not interested in a dual ...
7
votes
2answers
1k views

Why don't we have 33-bit CPUs? [closed]

I have seen that CPU's and operating systems have moved upwards in terms of bits from 8-bit to 16-bit, to 32-bit and currently to 64-bit. I understand that this change is to increase the maximum ...
7
votes
2answers
7k views

How to enable 32-bit binary compatibility on Linux Mint 11 x64

I've recently installed x64 Linux Mint 11, basically Ubuntu Natty. Since the install I've found that 32-bit applications which used to run on my Ubuntu system are rejected by my Mint 11 system. When I ...
7
votes
1answer
6k views

run 32-bit task manager in windows 7 64-bit

I read in this answer that Windows 7 has two versions of the task manager, one being 64-bit and the other being 32-bit. How do I go about running this 32 bit version of the task manager in Windows 7 ...
6
votes
5answers
41k views

How to check whether my hardware is 64-bit capable in Windows?

My OS is 32-bit but I want to know if my hardware support 64-bit
6
votes
4answers
53k views

How to use program like Autocad of 32 bit work on computer having OS Windows 7 of 64 bit?

I purchased Dell note book and it came with Windows 7, 64 bit. Now when I try to install AUTOCAD 2008 version, which is in 32 bit, I am unable to run the software. I get message that you can't run ...
6
votes
1answer
3k views

What is the max. capacity of RAM in 32-bit machine? Why it is not 16GB? [closed]

This question is inspired from a question in stackoverflow here To what I know, for 32bit machines, we can have 2^32 combination set of instructions. so for a max capacity of a RAM in 32-bit ...
6
votes
2answers
9k views

How to insert registry entries from a .reg file into 32-bit registry, on 64-bit Windows

In 64-bit windows (Vista/7), there's HKLM/Software/Wow6432Node where all the 32-bit registry stuff is. If I have a .reg file with some keys in it, how can I tell regedit to import it into the 32-bit ...
6
votes
3answers
18k views

Can I upgrade from Windows 7 32-bit to Windows 7 64 bit without reinstalling all of my software? [duplicate]

Possible Duplicate: When reinstalling Windows 7, does the language, version, architecture (64-bit or 32-bit) or source (OEM, retail, or MSDN) matter? I'm getting a new PC soon and thinking ...
6
votes
3answers
4k views

Why does installing NVidia 9600GT graphics card, take 1GB of RAM away from Windows?

I've changed graphics cards in my PC and now Windows 7 (32bit) is reporting that I have a whole gigabyte less physical RAM in my PC. Why is this? Firstly, the machine has 4GB of physical RAM. The old ...