Refers to CPUs that use 64-bit words. Examples are Sun's UltraSPARC series, the G5 processors in the Macintosh and Intel's Itanium family.
In the x86 PC world, AMD was the first to move to 64-bit CPUs with its 2003 introductions of the AMD64 Opteron and Athlon chips. Microsoft added support in Windows XP for AMD's 64-bit instructions (AMD64). Although Intel featured 64 bits in its Itanium line, in response to AMD, it introduced 64-bit x86-based Xeon CPUs in 2004. The 64 bit CPUs were first called "Extended Memory 64 Technology" (EM64T), but later changed to "Intel 64." Intel 64 chips incorporate AMD's 64-bit instructions. See bit specifications, Intel 64, Opteron, Athlon, UltraSPARC and G5.
In the x86 PC world, AMD was the first to move to 64-bit CPUs with its 2003 introductions of the AMD64 Opteron and Athlon chips. Microsoft added support in Windows XP for AMD's 64-bit instructions (AMD64). Although Intel featured 64 bits in its Itanium line, in response to AMD, it introduced 64-bit x86-based Xeon CPUs in 2004. The 64 bit CPUs were first called "Extended Memory 64 Technology" (EM64T), but later changed to "Intel 64." Intel 64 chips incorporate AMD's 64-bit instructions. See bit specifications, Intel 64, Opteron, Athlon, UltraSPARC and G5.
 | Reproduced with permission from Computer Desktop Encyclopedia. Copyright (c) 1981-2008 The Computer Language Company Inc. All rights reserved. |
Additional Resources
- Internet abuse and Cloud Computing
- A recent uproar in the right wing blogosphere about the shutdown of anti-Obama sites on blogger.com has some serious implications for those considering cloud computing. What seems to have happened there was a simple, if pernicious, denial of service attack carried out for political reasons - but there's not much...
- Blog posts 2008-07-05
- TechForward advocates the cause of temporary ownership
- I have been MEANING to write about the Los Angeles-based start-up TechForward for weeks now, but felt like I didn't have enough time to write the truly thoughtful post that it deserved. Now, I'm forcing myself to get off my butt, strangely enough, because I'm having a moral dilemma over...
- Blog posts 2008-07-04
- Aspose.Recognition for .NET (zip)
- With Aspose.Recognition you can add intelligent PDF to word processing documents conversion to your 32-bit and 64-bit .NET applications. Aspose.Recognition reads a PDF file, recognizes editable document structures and allows saving the resulting document as Microsoft Word DOC, Office Open XML OOXML, OpenDocument ODT, Rich Text Format RTF, Wordprocessing ML...
- Software downloads 2008-07-04
- Say it ain't so AVG, say it ain't so: AVG LinkScanner = Badware?
- The Register covered a very interesting story about AVG. Apparently AVG is spamming the Internet with traffic that looks to be coming from Internet Explorer. AVG software pre-crawls search results to try to protect users, but uses a user agent that makes the software appear to be Internet Explorer. This pre-crawling is flooding websites with...
- Blog posts 2008-07-03
- Nothing stealthy about this Windows Update update
- Nothing stealthy about this Windows Update updateStill got it wrong?!?!What part of "check for updates but let me decide" do they not understand???If the people at MS are feeling so benevolentwhy not have the programmers pop up a box when the update occurs, sort of hand holding for the wary.If...
- Discussion threads 2008-07-03
- Apple caught neglecting iPhone security
- Apple caught neglecting iPhone securityApple doesn't really care.I believe that Apple puts security of its products at the bottom of the list, with cool design at the top. All this stuff just proves me right, that sure they have a neat casing and a touch screen, but underneath it...
- Discussion threads 2008-07-03
- I have to stop using Gmail :(
- I have to stop using Gmail :(You can enable POP3 support in Gmail...If you switch on POP3 support in Gmail, then you can still comply with archiving procedures: http://mail.google.com/support/bin/answer.py?hl=en&answer=13273That way, you can both send and receive e-mails with an e-mail client like Thunderbird or Evolution or even Outlook Express. I...
- Discussion threads 2008-07-03
- EIC podcast: Search wars; Viacom vs. YouTube (and its users)
- On this week's EIC squared podcast Dan and I talk about all the search happenings this week--Google and Adobe, Microsoft and Powerset and the never-ending Microhoo saga--as well as the Viacom vs. Google lawsuit. It was a busy week on the search front. Adobe kicked off the...
- Blog posts 2008-07-03
- Can Mozilla's security metrics project end the patch-counting nonsense?
- Can Mozilla's security metrics project end the patch-counting nonsense?Can Mozilla's security metrics project end the patch-counting nonsense?I only had a quick look at the spreadsheet so I may be wrong. However it looks like this is bug counting exercise with a bit of 'how long were we exposed?' thrown in....
- Discussion threads 2008-07-03
- Airport security part 4: Attack of the body scanners!
- Airport security part 4: Attack of the body scanners!Airport SecurityI'm fairly sure if anyone was to see me naked... their eyeballs would no longer function anyway. I say go ahead, it's more a punishment for them than me. But I can certainly understand why many people would find...
- Discussion threads 2008-07-03
- Airport security part 4: Attack of the body scanners!
- If you read my blog postings semi-often, you know that I'm very, very critical of problems with airport security. Nicole Wong of the Boston Globe reported that Boston's Logan International Airport will become the next airport to implement full-body scanners (thanks for the link from the LiquidMatrix guys!) that can see...
- Blog posts 2008-07-03
- WordPress, Gears, and the converging browser/desktop
- WordPress, Gears, and the converging browser/desktopGears is good, but, we still need support for a better compiled languagelike a special sand-boxed version of Java. Without Java or similar, we can NOT do things like import complex file types or do a lot of the things that we need for full...
- Discussion threads 2008-07-03
- Whither Blu-ray?
- Whither Blu-ray?It's the lack of HDTV ownersand the ignorance of those who do own that I think is the biggest issue. People who don't have HDTV would see no benefit to spending extra money on BluRay, and those who do own will never believe there is a difference unless you...
- Discussion threads 2008-07-03
- Q'n'A: Are Youtube users are royally screwed?
- I've been reading the headlines today, and the main headlines on most of the top technology websites are about the YouTube/Google/Viacom saga. I'd like to call this: Youglecomgate, a potentially volatile situation hovers over the midst of everyone who has been on YouTube ever, so that's probably the majority of...
- Blog posts 2008-07-03
- 12 terabytes of YouTube data
- A lot of us block YouTube access in our schools. There's plenty of objectionable content worth hiding from young eyes. Probably an equal number of us, however, leave it open at the request of teachers who use its vast resources for teaching (yes, there is more than zit...
- Blog posts 2008-07-03
- Seven Tech ways to make America better this July 4
- Seven Tech ways to make America better this July 4Drill Here. Drill Now. Pay Less.Get the environazi boot of our neck.Build more refineries.Reduce government regulations.Eliminate the Endangered Species Act.Build more dams for flood control.Build more highways to relieve traffic congestion.Relax nuclear power plant requirements to build more reactors.Your mindset is...
- Discussion threads 2008-07-03
- Nvidia whacked over defective notebook chips; Offers driver to keep processors cool
- Updated: Nvidia said its fiscal second quarter revenue will fall well short of targets because of weak demand, pricing pressure from AMD's ATI and a faulty graphics processors on older notebook systems. In an SEC filing, the company said it is offering a driver that keeps fans running to relieve...
- Blog posts 2008-07-03
- Helpdesks and productivity
- Helpdesks and productivityGood start, and then...You lost it.1980 CalledThey want their mainframes back. :DWhy don't you explain your present value...calculation. Do you even know what present value means? What time period are we talking?Huh?You imply that on a Sun Ray platform the only problems are the applications or how they...
- Discussion threads 2008-07-03
- Hyperic CloudStatus
- Back in May, I posted my take on Cloud computing. Since that time, I've spoken to quite a number of suppliers who are focused on supporting cloud computing, managing cloud computing, and even using cloud computing as a way to provide either a desktop or a server experience without the...
- Blog posts 2008-07-03
- Talent shortage? How to win with what you've got
- If you're not finding the talent you need in this super-competitive market, Vince Thompson suggests you look in another direction: toward the staff you already have. As he explains in this FT Press article, you may be able to turn your "losers" into "winners" with a little bit of effort....
- Download resources 2008-07-03
Neighboring Terms
Premier Vendor Content Whitepapers, webcasts & resources from our Power Center Sponsors
- Which solar technology will survive?
-
At the Cleantech Forum in San Francisco, Todd Glass of Heller Ehrman moderates a discussion, among tech execs, on the various solar technologies making a difference in the green movement.
- Watch the video >>
- Leading Virtualization Performance
-
Read how the Intel® Xeon® processors perform on VMware ESX* Servers and why they are the best choice for virtualization, providing energy efficient performance. IT can now respond more quickly and get more done throughout the day.
- View the benchmarks >>
- The Cisco Mobility Resource Center is your source for FREE mobility solutions
-
The Cisco Mobility Resource Center offers FREE videos, downloads, podcasts and more, all designed to help small and medium businesses get mobile connectivity solutions, improve productivity and drive sales and revenue.
- New mobility solutions at the Cisco Mobility Resource Center
-
-
Tasty Baking’s new LEED factory
0:57
Tasty Baking CIO: Brendan O’Malley
-
Balancing act: innovation vs. reliability
1:28
Facebook VP of technical operations: Jonathan Heiliger
-
Securing data at E-Loan
1:47
E-Loan CIO: Jay Shah
-
When crops are scarce
1:47
Del Monte Foods CIO: Marc Brown
- View all CIO Vision Series Videos »
