64-bit computing

(redirected from 64-bit processing)

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 ?
This architecture support enables the Nucleus RTOS to leverage the benefits of 64-bit processing for a full range of 64-bit SoCs.
This happened with the iPhone 5s, and it took Android smartphone makers some time to catch up with Apple, as far as 64-bit processing was concerned.
Taking advantage of 64-bit processing and large addressable memory space, the performance gain is nearly 15% over previous versions.
While Exynos processors are not below the quality of Snapdragon counterparts, it is still better to have a device with eight cores sporting 64-bit processing support.
It has twice the CPU and graphic performance of the fourth-gen iPad, and the Air boasts 64-bit processing like the recently launched iPhone5S.
With an inviting interface for users of all levels, PhotoDirector 5 uses the power of 64-bit processing and uniquely integrates the three major tasks related to digital photos: editing, collection management and high-quality adjustments.
The current ARM processors lack many of the critical features sought in data centres today, such as 64-bit processing and memory capabilities.
MIPS Technologies has a long history in 64-bit processing.
Don't bother upgrading an XP PC that is more than three years old; its outdated hardware can't take full advantage of Windows 7's capabilities, such as 64-bit processing and XP Mode's hardware virtualization.
Additionally, it specs out at 533MHz FSB, 64-bit processing with a peak TDP of only 8W.
Also, 64-bit processing support was added to exploit the latest in computer hardware, and built-in database management simplifies IT administration.
Upgrades to the package include 64-bit processing support, better distributed processing of simulations than past versions, improved support for exploiting periodicity in designs, and an optimization tool that applies multiple algorithms to resolve complex problems.