memory capacity

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Related to memory capacity: terabyte

memory capacity

[′mem·rē kə′pas·əd·ē]
(computer science)

memory capacity

The total memory (RAM) that can be added to a computer depends on the address registers built into the CPU. For example, most 32-bit CPUs can address only up to 4 gigabytes (GB) of memory.

The reason the maximum capacity in a 64-bit computer is limitless for all intents and purposes (see chart below) is that 64-bit hardware manipulates (calculates, compares and copies) 64 bits, or 8 bytes, of data at a time. However, the actual memory is addressed with far fewer bits. Look up the number 64 in binary values, and note that a 64 bit register could address 16 exabytes of memory, which is 16 million terabytes. See memory.

                      Bytes       Maximum    Processed CPU     Memory   Simultaneously

   8-bit   65KB       1

  16-bit    1MB       2

  32-bit    4GB       4

  64-bit    **        8

 ** Limitless for all intents
    and purposes.  No computer can
    be built to accommodate the
    64-bit theoretical maximum.
    See  binary values.
References in periodicals archive ?
12) Their results suggest that competing auditory streams are less distracting to individuals with high working memory abilities; therefore, listeners with higher working memory capacity may be more adept at separating target signals from a complex situation.
With increasing data demands, our customers need a solution that will increase memory capacity and application performance while reducing power consumption," said Jim Ganthier, Vice President, Marketing and Operations, Industry Standard Servers and Software, HP.
Estevez and Calvo (2000), Calvo (2001; 2004) and Linderholm (2002) examined the role of working memory capacity in the making of predictive inferences.
Converging evidence from many psychological science studies suggests that high working memory capacity is associated with better performance at mathematical problem-solving.
More recently, Cowan (2001) proposed that working memory capacity is about four chunks in young adults and fewer in children and old adults.
So the study can't address whether differences in working memory capacity limit the performance of expert sight readers, he says.
Siegel further asserts that studied subjects who took drugs that induced REM sleep deprivation did not necessarily have a lessened memory capacity.
The X4170 M2, X4270 M2 and X6270 M2 contain 18 memory slots for large memory capacity.
Daniel Levinson, a psychologist at the University of Wisconsin-Madison in the United States, said that those with higher working memory capacity reported "more mind wandering during these simple tasks", but their performance did not suffer.
The design team is now preparing to use FineSim in their next generation memory design, with larger memory capacity and much faster clock speed on their most advanced process.
As next generation IAs come online, they will contain double the flash memory capacity of today's units.
Strikingly, the ability to detect positive correlations rises as working memory capacity declines and as volunteers render decisions based on progressively smaller samples, Kareev reported in the September Journal of Experimental Psychology: General.