64-bit computing

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64-bit computing

CPUs that process 64 bits as a single unit, compared to 8, 16 or 32. Today's fastest computers are 64-bit machines; however, that does not mean they are twice as fast as 32-bit computers, because the 64 bit "word size" is only one aspect of internal processing. The CPU's clock speed, along with the speed of storage, RAM and input/output (the peripheral bus) all play important roles in a computer's performance (see throughput). In many cases, the perceived difference can be negligible. See word.

More Memory
A major advantage of 64-bit operating systems is their support for more RAM than a 32-bit OS, which is typically limited to 4GB. For example, 64-bit Windows 10 Pro supports up to 512GB. See PAE.

A Lot of 32-Bit Software
Although CPUs migrated to 64-bits years ago, many 32-bit applications are still running in their 64-bit personal computers. Windows comes in both 32-bit and 64-bit versions, but Apple upgraded the Mac OS entirely to 64 bits in 2009.

The complete migration from 32-bit applications to their 64-bit counterparts may take a long time. For example, people still run 16-bit DOS and Windows applications in their 32-bit Windows PCs that were written more than two decades ago. This is why some users install the 32-bit version of Windows, because 64-bit Windows does not run 16-bit apps natively (see Windows XP Mode). For examples of 64-bit hardware, see Intel 64, AMD64, Opteron and Athlon. See 32-bit computing and bit specifications.


References in periodicals archive ?
All components of the system shall be under windows 64-bit computer control and operate under windows 7 or higher computer operating system software.
com/2014/02/10/new-trojan-exploits-paul-walkers-death-snare-victims/) ITporta l stated security firm Symantec that, "Once the malicious file has been executed an error notification is sent indicating that a 32-bit or 64-bit computer is needed to run the file.
Modern 64-bit computer processors outperform the older processors found in keyboards.
3 with support for 64-bit computer platforms and expanded capabilities to seamlessly embed Open File Manger into virtually all OEM backup solutions.
Linux developers are beginning to adopt the 64-bit computer architecture.
It fully supports new 64-bit computer operating systems including Microsoft Windows NT and Linux, and can be used in high-performance PC servers and workstations as well.
25, in the New York Times, a new 64-bit computer chip that can process as many as 400 million instructions a second was announced by Digital Equipment Corp.
We at Z-CAD AS are delighted to hear that the new AutoPLANT V8i release will be compatible with 64-bit computer hardware and Windows," said Terje Olaussen, chairman, Z-CAD AS.
Both business and consumer versions will be available for 32-bit or 64-bit computer systems.
A 64-bit edition that allows users to take advantage of the expanded memory capacity of 64-bit computer systems to process huge datasets generated by the newest generation of non-contact 3D scanners.
Geomagic Studio 9 (64-bit edition) takes advantage of the expanded memory capacity of 64-bit computer systems to process huge datasets generated by the newest generation of non-contact 3D scanners.
In addition, he pointed out that MicroStation V8 XM will take advantage of all available memory even when running on a 64-bit computer with more than 4 gigabytes of memory; therefore, that is the optimal workstation for users who work on enormous designs.