A 64 bit program use more memory than a 32 bit program (since each pointer is twice the size).I have been a bit reluctant to move Fast Video cataloger from 32 bit to 64 bit because For example, A 64 bit video player using direct show filters can only use the 64 bit versions of the filters. A 64 bit program can also only use other 64 bit components.It can only run on a 64 bit version of Windows.So the big advantage of a 64 bit program is that the program can use more than 3 GB of memory but what are the downsides compared to a 32 bit program? Traditionally, most applications never really needs more than 2GB of address space. However, there is nothing preventing multiple 32 bit programs running in parallel each using 3 GB of memory. With some tricks a 32 bit program Windows program can at most get access to 3 GB of memory. By default, a 32 bit windows program only has access to 2 GB. In Windows some of the address space is reserved. Under System, you can view the system type. Open System by clicking the Start button, right-clicking Computer, and then clicking Properties.Ģ. Today just about everyone is running on 64 bit windows.ġ. The 64 bit desktop version of Microsoft Windows has been available since Windows Vista. 32 Bit programs and can be run in a 32 bit or 64 bit version of windows. In 32 bit mode programs are limited to use 4GB of address space. On Intel CPUs software can run in either 32 bit or 64 mode. Here is first a bit of a simplified technical background…
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