Windows Vista 64-bit Computing

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Choosing Between Windows Vista 32-bit and 64-bit Editions
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About Windows Vista 64 Bit: Historically, the 64-bit edition of Windows XP hasn't been a runaway hit. It's not really surprising in many ways: the x64 version was a rather specialist product built off the Windows Server 2003 codebase, which traded a loss of support for a number of features (including .NET Framework and DirectX in early releases) in return for the ability to address vast amounts of memory from a single process.

Since the AMD64 and Intel EMT64 ranges of processors happen to run 32-bit code extremely quickly, it's not surprising that even though probably the majority of machines sold these days are 64-bit capable, they are running the standard 32-bit version of the Windows XP operating system, with the 64-bit edition used mostly for workstation-class tasks such as engineering and scientific applications.

In Windows Vista, the choice becomes far more pertinent for most people. Gone are the limitations of the 64-bit edition in terms of what software comes shipped with the operating system: a "Longhorn Basic" requirement for any feature to have been accepted into the operating system was to be supported on both 32-bit and 64-bit platforms. But the 64-bit version also takes advantage of the hardware to offer some attractive security features that are exclusive to that platform. On the downside, you'll still see weaker down-level compatibility on the 64-bit platform: for example, we don't support 16-bit code from the Windows 3.x days (which is a little more of an issue than many people realize due to the inclusion of 16-bit code in the installers for some decidedly 32-bit applications).

The choice is an interesting one, and by far the best article I've seen explaining the differences between the two platforms in detail is from Paul Thurrott's Windows Supersite. It succinctly defines the pitfalls and strengths of each choice. It's also worth checking out the Windows Vista Product Guide for more details. I'm considering holding out for one of the new Merom-based notebooks that will contain dual-core, hyperthreaded 64-bit processors: so much power in one portable machine that it makes me drool!

Does this Architecture Change Make a Difference?

Introduction
By now, many people have probably heard the various reports about 64-bit computing coming to consumers. Apple was the first to offer the hardware with a 64-bit processor with their new G5 system. AMD has just released its Athlon 64 processor that has support for the first 64-bit operating system (a variant of Linux). But is this shift to 64-bit computing going to be a huge boon for the consumers?

Understanding Bits
All computer processors are based on binary math because of the transistors that comprise the semiconductors inside the chips. To put things in very simple terms, a bit is a single 1 or 0 either stored or processed by a transistor. All processors are referred to by their bit processing ability. For approximately the last 10 years or so, 32-bit computing has been used since the introduction of Intel's 386 platform. So what does the bit count mean?

This bit rating of the processor determines the largest numerical number that processor can handle. The largest number that can be processed in a single clock cycle will be equivalent to 2 to the power of the bit rating. Thus, a 32-bit processor can handle a number up to 2^32 or roughly 4.3 billion. Any number greater than this will require more than one clock cycle to process. A 64-bit processor on the other hand can handle a number of a 2^64 or roughly 18.4 quintillion (18,400,000,000,000,000,000). This means that a 64-bit processor would be able to more efficiently handle large number mathematics.

Memory is the Key
One of the other items directly affected by the bit rating of the processor is the amount of memory that the system can support and access. Let's take a look at the current 32-bit platforms of today. Currently 32-bit processors and operating system can support a total of 4 gigabytes of memory in the computer. Of the 4 gigabytes of memory, the operating systems can only allocate 2 gigabytes of memory to a given application.

Looking at the Athlon 64, AMD included support for 40-bits of memory registers rather than 64-bits. Even with this cost cutting measure, the Athlon 64 is able to support a total system memory of approximately 136GB of RAM. This is well beyond what the memory market can even supply to computers currently. In addition to this, a 64-bit operating system can also allocate an individual 4GB block of memory for each application.

Now for most consumers, this won't make much of a difference because most home systems don't even come with 1GB of memory, but for high-end users that do CAD/CAM or scientific research, this can make a huge difference. It also is very important for server systems running large applications such as databases.

What is a 64-bit CPU without a 64-bit OS?
So far we have been talking about the capabilities of the processors based on their architecture, but there is a key point to be made here. The full use of a processor is only as good as the software written for it. Running a 64-bit processor with a 32-bit operating system is going to end up wasting a large amount of the computing potential of processor. The 32-bit operating system is only going to use half the registers of the processor thus limiting its computing ability. It will still have all the same limitations on it that an existing 32-bit processor has with the same OS.

This is actually a fairly large problem. Most architecture changes such as 64-bit processors generally require a completely new set of programs be written for them.

This is a large problem for both the hardware makers and the software makers. The software companies don't want to write the new software until the hardware is out there to support their software sales. Of course, the hardware people can't sell their product unless there is software to support it. This is one of the major reasons why enterprise CPUs such as the IA-64 Itanium from Intel had problems. There was little software written for the architecture and its 32-bit emulation to run the existing operating systems severely crippled the CPU.

So, how are AMD and Apple getting around this problem? Apple has started added 64-bit patches for its operating system. This adds some additional support, but it is still running on a 32-bit OS. AMD has taken a different route. It has designed its processor to handle the native x86 32-bit operating systems and then added additional 64-bit registers. This allows the processor to run 32-bit code as effectively as a 32-bit processor, but with the current 64-bit versions of Linux or the upcoming Windows XP 64 it will utilize the full processing potential of the CPU.

Is the Time Right for 64-bit Computing?
The answer to this question is both yes and no. The industry is reaching the limits of 32-bit computing for much of the higher end computer market such as enterprise and power users. If computers are to increase in speeds and processing power, it is necessary to make the jump to the next generation of processors. These are systems that generally require much more memory and large number calculations that will get the direct benefits of a 64-bit platform.

Consumers are a different matter. Much of the tasks that the average consumer does on the computer are more than adequately covered by the existing 32-bit architecture. Eventually, users will get to the point where the switch to 64-bit computing will make sense, but currently it does not. How many consumers out there will likely even have 4 gigabytes of memory in a computer system even in the next two years?

The real benefits of 64-bit computing will eventually trickle down to the consumers. Manufacturers and software developers like to limit the variety of products that they have to support to try and reduce costs. Because of this, they will eventually focus solely on the production of 64-bit hardware and software. Until that time, it is going to be a bumpy ride for those who choose to be early adopters.

Windows Vista and 64 Bit Computing
Virtually every Windows Vista edition (with the exception of Starter) will ship with both 32-bit (x86) and 64-bit (x64) versions on the same DVD. Microsoft expects the computer buying public to switch to x64 during Vista's lifetime. There will not be an Itanium version of Windows Vista.

Source: About.com

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Nightmare! I sent it back after ...

didn't know I wouldn't be able to use my printer Not rated yet
I just got a new computer and found out that I have 64 bit Vista and 64 bit Dell studio 1537. I can use my printer, but can't see ink levels and can't ...

64 / 32 no difference Not rated yet
I don't see any difference between the 64 bit and the 32 bit.

I'm using Vista 64 laptop (4GB Ram), and XP 32 bit desktop (2GB Ram), believe it or not,...

Dell Inspiron 6400 Not rated yet
I Have this dell, with the T7200 processor, i recently installed a 64 bit version of vista, its running smoothly so far, and faster for sure, but the thing ...

Rich Madden, Consultant Not rated yet
I have a AMD MSI system with the 5000 cpu which I built my self from parts I bought at Tiger Direct.com.

I have the Vista 64 bit OS. The curious thing ...

windows vista 64 bit and checkpoint secure vpn Not rated yet
I love windows vista 64bit Home Premium with 4gig ram AMD Turion 64 mobil technology but hate the fact that "windows" or checkpoint has come up with a ...

Add Network Location in Vista 64 bit Not rated yet
It simply will not work if you are attemting to add a website where you store files (such as a sharepoint site).

In my office we keep all of our OneNote ...

Wish I had Vista 32 bit Not rated yet
I have Vista 64 bit on my new Dell Studio 1535, 4 GB RAM, and have had nothing but trouble.

A driver for my Lexmark x4530 printer/copier/scanner is ...

Nuance Slays Dragon Naturally Speaking Not rated yet
I have not found a way to run DNS Version 9 on my 64-bit Vista system.

Information on the vendor's site just makes an excuse that for an application ...

running vista 64 bit edition on 32 bit machine Not rated yet
I am currently running vista 64 bit Ultimate edition on a 32 bit machine Toshiba laptop. It works can I keep doing this or will it crash?

Computer Switch Not rated yet
So my dad was going to get a MacBook. But then he realized that one of the apps he needed wasn't capable with Apple software.

So then him and I decided ...

I love Vista 64 Not rated yet
I've been using Vista 64 for over a year without problems....of course I'm one of those people that update hardware very often.

I run a quad core ...

64 bit Not rated yet
moved over to 64 bit vista so far so good, few bumps i am running 8gigs of ram on quad core intel 2.66 .
one kinda down point, takes just as long to boot ...

Very happy with Vista 64-bit Not rated yet
When I discovered that Adobe Photoshop CS4 had a 64-bit edition, I went out and bumped up my RAM to 8GB and installed Vista 64-bit.

All of my devices ...

lucas8489@comcast.net Not rated yet
i wish i did not have vista 64 bit on my computer.most programs do not load.

do i have a way of getting 32 and getting 64 off. i have a health program ...

Vista 64-bit Enterprise Not rated yet
We are deploying Windows Vista 64-bit Enterprise and so far it has be stable.

We have a few issues with Unix interoperability and some 32-bit engineering ...

Tboy Not rated yet
i've tried to download updates for the 64bit vista but nothing is compatable because it's not a 32bit.

THE 64BIT SUCKS BIG TIME.

John with Vista Not rated yet
I have a new computer with Windows Vista 64 bit processor.

I need to log in to my office computer so I may work at home but have this problem.

My ...

64 bit regrets Not rated yet
I'm a person who loves to work on photos!

I can't tell you how disappointed I am in Adobe Photoshop! Been using it since version 4.

I have a new ...

Retired photoshop Not rated yet
I purchased acer computer with Vista 64 bit installed.

I did not know what bits were but have read the difference between 32 and 64 bit .

I ...

ejs, attorney Not rated yet
I hate it. I would have bought a Mac but I didn't want to have to buy new software to support the Mac, so I bought a PC w/ Windows Vista 64-bit. It will ...

Photoshop CS4 64 bit Not rated yet
I am running 64 bit Vista on a machine with 8GB of memory. I just installed Adobe CS4 which includes a 64 bit version of Photoshop. I am amazed how much ...

Bill Not rated yet
Vista 64bit is nothing but problems.

I can't print wirelessly, images don't show up in documents, problems burning DVD's, windows media player, DVD ...

This is just a curious question. Not rated yet
I've been wondering about if switching to ultimate 64 will have me regretting I did, or if I'll be happy about the choice.

I've been learning more ...

Head Chemist, Metallurgical Testing Department Not rated yet
I'm impressed after a few days experience with Vista 64 Home Premium.

I received the alternate 64 bit media disk with SP1 built-in for $9.99 from ...

A disaster Not rated yet
I discovered that my beloved Dragon voice recognition software wouldn't work on a 64-bit platform; can I "go back," if yes, how? wil

Technoman Not rated yet
I own a laptop with the new system containing 32 bit and 64 bit.

Of course there are a great many things out there that work well with the existing ...

Vista 64 I got screwed Not rated yet
Bought as new HP laptop and didn't know the difference between 32 bit and 64 bit.

Salesman said 64 bit would speed everything up for us. Wow faster!...

vista 64 bit is really a headache Not rated yet
Nothing works well, can t use my computer with lots of programs.... please fix it soon!!!!!

mediamick Not rated yet
Windows Vista 64bit with a quad core proc. 5 Gigs ram and a GTX260 video card running DX 10 is POWER that dream's are made of in PC Gaming.

Having said ...

driver for benqs2w4300u scanner driver for vista 64bit Not rated yet
i have facing problem for when installing scanner benq s2w4300u not found driver plz give the device driver

Such Brave New Worlds Not rated yet
I have recently made the switch to a 64 bit PC and found myself being inexplicably compelled to use Vista 64 Home as a step toward seeing the "improvements"...

cliff29@rogers.com Not rated yet
I am using windows vista 64 bits and I can't get my audio to work, it seems to record but the playback is silent other sound recorded before are ok..

I get better frame rates on Windows Vista 32 bit than on 64 bit. Not rated yet
I get better frame rates on 32 bit than on 64 bit. I have 4 GB ram.
I was told that the 32 bit only reads 3 GB, so it leaves the extraGB for PCI graphics ...

Test Engineer Not rated yet
Apple was not the first to support "TRUE" 64 bit computer. As usual, Apple stretched the truth out big time.

As for running 64 bit Vista; it's extremely ...

Jazz Not rated yet
Vista x64 is easy...

I'm a System Builder/Integrator and recently setup for a client a Vista x64 gaming rig.

Yes, there were idiosynchrasies with ...

Vists64-Ult, RAID, Ram Not rated yet
I have been building my own PC's for years and decided to give Vista64 a try.

Mostly so I could become familiar with it and be able to help others....

Down on 64 bit vista Not rated yet
I built a system with 4 gigs ram, and ATI Radeon 2600 pro video card and a 6000+ AMD processor.

The OS became a nightmare as soon as I started working ...

"Not Supported" Not rated yet
The story has been the same since I purchased my new HP desktop with Vista 64 bit, 64bit not supported.

I tried to download my Palm software and the ...

Vista 64 bit Not rated yet
I recently purchased a gateway people laugh at me for that reason BUT!

I run Vista 64 bit, with a 2.66Ghz quad core processor and 6Gigs of ram,

Honestly ...

Choosing Between Windows Vista 32-bit and 64-bit Editions Not rated yet
Hello.
I am responding to your article: Choosing Between Windows Vista 32-bit and 64-bit Editions.

It seems to me that every progress issue around ...

Vista-64 bit-java applets Not rated yet
A friend of mine purchased a new Vista Ultimate with the 64 bit..
She does stationary and java applets and so far has not been able to get the settings ...

small recording studio Not rated yet
iam starting a small recoding studio to do some project's i just got a new laptop it's a hp pavillion dv6809wm with a amd truion64x2 2.0 processor with ...

Vista 64 Rocks!! Not rated yet
I ran Vista 32 Ultimate for several months and overall was pretty happy. I decided to take the plunge and be on the leading edge for once and I am so ...

Windows Vista 64bit is a HEADACHE Not rated yet
That is all I can say.

It is super for just surfing But I can not get anything to install I just tried to install an external drive to try to use some ...

Problems with Windows Vista 64 bit.. Not rated yet
i bought a new computer with vista 64.Most of my current programs,Palm,dragon 9 etc will NOT run on it.

Virtual pc does not address these problems.

Now ...

Windows Vista 64 bit is very stable! Not rated yet
cos of Driver signin', I guess my Vista 64bit feels like it's NT-2000-XP compared to win 95 98 ME. Vista 64 is just STABLE! Never crashes. When sumptin'...

The Future is Now Not rated yet
I am running Vista X64 on a Gateway w/AMD 9600 Quad Phenoms and ATI Radeon HD3870 GPU.

After 4 months I can say that It is fast, stable and with great ...

Dennis Hobbs Not rated yet
Hi

I upgrade one machine to Vista 64, but the main reason was to break the 2GB-£Gb boundary, but the 3D software I use is 64Bit but when I try to rended ...

Vista Ultimate 64 bit RULES!! Not rated yet
I had installed vista ultimate on my hp media centre pc,i installed the 32 bit first then realized i had a 64 bit software disc also.

I installed it ...

Markiemrk Not rated yet
I am so frustrated that i can not find one single registry program such as reg cleaner or system mechanic 7 that supports 64 bit!!!!!!! Why!!!!!!!!!

X64 suks Not rated yet
WEll vista x64 suks because it is more compatible with x86 programs than x64 programs, and it is very unstable!!!!

waste of time and $money$

It is time to upgrade my old software. Not rated yet
I just bought a new quad core 64 bit machine with Vista 64.

Great System and I was warned that my older apps might not work.

Visual Basic 6 has ...

Retired Not rated yet
It's GREAT not to be able to use some purchased program's that do not run with Vista.

How about a program that changes 32 bit to a 64 bit so the programs ...

Vista x64 is ok Not rated yet

Intel Q6600 Quad Core 2.4 > 3.0 (FSB 1333)
(2) PNY Geforce 9600 GT 512MB in SLI
4GB of 5-5-5-15 DDR2 1055 (2x2GB)
(2) 250GB WD 7200RPM 4MB Cache ...

Vista Ultimate with 8GB Ram rocks Not rated yet
Seems there is no reason for more than 2GB of RAM since there are no apps or very few with can access more than 2 GB.

Most only access 2GB and no more....

A guy in Florida Not rated yet
Wow I can't believe this article was written in April 2008. This story is pretty amazingly backwards. The guy writing the article questions how many ...

Microsoft Windows SDK on Vista Ultimate 64-bit Not rated yet
Hi,
Here is my hint how to install Microsoft Windows SDK on Vista Ultimate 64-bit.
If you run web install from Internet Explorer as user-member of administrators ...

I'm waiting for my OEM Vista 64 bit to be mailed Not rated yet
I'm running a new mobo that has a theoretical memory capacity of 16GB. Coupled with an Athlon 64 X2 4000+ Brisband. I talked to a friend and I told him ...

Bob Not rated yet
"How many consumers out there will likely even have 4 gigabytes of memory in a computer system even in the next two years?"

I installed 4 gig memory ...

WINDOWS UPDATES FOR VISTA ULTIMATE 64 BIT Not rated yet
WHY ISN'T SERVICE PACK 1 FOR VISTA AVAILABLE FOR DOWNLOAD?

32 bit wont recognize more than 3 gig of memory Not rated yet
i put in 8 gig of high performance gamers memory in and 32 bit only recognize 3 gig now i need to upgrade to 64 bit.

i want a 64 bit

AMD Tutirion 64x2 2.0 GHz running from between 32 bit and 64 bit OS Not rated yet
Hi Just want to share,

i definetely agree with you said above, if we have 64 bit machine it will better if we use 64 bit OS.

My experience, it significantly ...

gary (pleb2k6@hotmail.com) Not rated yet
To be truthful i had/have windows vista home premium edition but by a complete and freak accident i managed to format the drive with vista on it and replace ...

I switched, and I'm never going back... Not rated yet
I decided to give the 64-bit version of Vista a try when I install Vista on my machines over a year ago. I had 3 machines that were my main use machines,...

ERIK S Not rated yet
I HAVE AMD PLATFORM.

BUILT MYSELF AND USE AS MEDIA CENTER. I LOVE VISTA 64. WORKS VERY WELL.

PHOTO EDIT, VEDIO EDIT VERY FAST. MUCH BETER THEN ...

Mightymousenz Not rated yet
I have just built up a new machine as a media pc and took the chance on vista 64.

So far works with Itunes (have they fixed the problem now?).

Biggest ...

X IBM ENGR. NOW A TEACHER ELECTRONICS COMPUTERS AND MATH Not rated yet
I have been running XP x64 for over 2 years. I received a free 6 month beta ver. from Microsoft then bought the XP x64 OEM version. Minor problems with ...

Vista 64 bit works flawlessly - except for one program Not rated yet
I installed and have been running 64bit Vista for about 2 weeks now.

It' see's all 4gb of memory (as it should), and runs fine. The only application ...

Vista 64 Excelllent Not rated yet
I am on Vista 64 and it is excellent!

I have had no problems with hardware however the majority of it it <1 year old. (Q6600, 8800GT, P5n32 Sli Plus,...

home user using 64 bit. Not rated yet
i like 64 bit because when heavily multi tasking windows 64 bit does not crash.

even with 4 gig xp stil crashed. same computer with vista 64 bit and ...

Vista Ultimate x64 Experience Not rated yet
I purchased a Compaq laptop/notebook PC and the configuration is as follows,

AMD Turion X2 x64 CPU
1GB DDR2 RAM
nVIDIA GeForce Go 6150 Grapics Card
...

Windows Vista Update

Windows Vista Update