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, they are not twice as fast as 32-bit computers, because the 64 bit "word size" relates to only one aspect of internal processing. The CPU's clock speed, along with the speed, size and architecture of the disks, memory and 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 to 64-bit operating systems is that they support more memory than a 32-bit OS, which is typically limited to 4GB. For example, while the 32-bit version of Windows 7 Professional handles 4GB, the 64-bit version supports up to 192GB. See PAE.

A Lot of 32-Bit Software
Although CPUs migrated to 64-bits years ago, the vast majority of people still run 32-bit operating systems and applications in their 64-bit personal computers.

New versions of Windows come in 32-bit and 64-bit versions, and Apple upgraded OS X for the Mac entirely to 64 bits in 2009 (see Snow Leopard). The complete migration from 32-bit applications to their 64-bit counterparts may take many years. For example, people still run 16-bit DOS and Windows applications in their PCs that were written more than two decades ago. This is why some users opt to 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 ?
The new additions to the MIPS family include the embedded 32-bit M-class M6200 and M6250 CPUs and high-end P-class P6600 64-bit CPU.
265 decoding, quad-core 64-bit CPU and quad-core GPU targeting the global over-the-top ("OTT") set-top box market.
As well as its UHD streaming ability, there's a new faster 64-bit CPU and graphics processor that speeds up the already nippy interface, and the addition of Amazon's excellent supersmart Alexa voice assistant which is handily accessed via a microphone in the Wi-Fi enabled remote.
EasyPort is based on a 64-bit CPU core subsystem that uses the MIPS64 5Kc processor core from MIPS Technologies Inc, a provider of industry-standard processor architectures and cores.
In a typical 64-bit CPU motherboard where some 100 channels need to be properly terminated and interfaced with the backplane, only 10 SIG chips (CMCPCI-100) are required -- compared to 90 discrete components comprising 14 FET bus switches (16-bit) and 76 resistor packs (four-pack).
It features 64-bit CPU resolution and a [mu]-SC Circuit, which reduces electrode wear during finish machining.
The Snapdragon 618 IP camera platform combines a powerful six-core, 64-bit CPU, next generation GPU, embedded DSP together with advanced video analytics to move beyond the smart camera to a conscious camera, that not only streams 4K HEVC, but can perform on-camera video analytics such as object detection, facial detection and recognition, multi object tracking, and QualcommA Zeroth object classification.
The Snapdragon 618 IP camera platform combines a powerful six-core, 64-bit CPU, next generation GPU, embedded DSP together with advanced video analytics to move beyond the smart camera to a "conscious camera," that not only streams 4K HEVC, but can perform on-camera video analytics such as object detection, facial detection and recognition, multi object tracking, and Qualcomm Zeroth(TM) object classification.
With the support for 64-bit CPU, the processing of video gets much more faster than ever," said Leo William, the manager of R&D department of Ephnic Software.
With its quad-core Cortex A53 ARMv8 64-bit CPU and 51 GFLOP GPU, the ARMADA 1500 Ultra s innovative architecture combines impressive processing power in an incredibly small package, which is four times smaller than other SoCs on the market, enabling powerful and aesthetically appealing compact STB designs.
With its quad-core Cortex A53 ARMv8 64-bit CPU and 51 GFLOP GPU, the ARMADA 1500 Ultra's innovative architecture combines impressive processing power in an incredibly small package, which is four times smaller than other SoCs on the market, enabling powerful and aesthetically appealing compact STB designs.
The latter, a 64-bit CPU, is also more powerful and faster, thanks in part to the upgraded RAM that now stands at 2GB.