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Difference in the files for 32-bit vs 64-bit apps and OS?

by 3264bit / July 22, 2011 4:52 PM PDT

I have read about the differences in 32-bit vs 64-bit apps and OS.

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All Answers

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There is
by Jimmy Greystone / July 22, 2011 10:04 PM PDT

There is, but it is for the executable and supporting library files, not the data files created to store output from the program. So a WMV file is a WMV file regardless of OS.

The ability for an app to use more than 4GB of RAM depends on three things all being present:

1: A 64-bit capable CPU (unless your system is more than about 4-5 years old, this is basically a given)
2: A 64-bit OS
3: A 64-bit app

All three must be present.

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Actually it's 2GB for apps.
by R. Proffitt Forum moderator / July 23, 2011 1:43 AM PDT
In reply to: There is

Due to a gaffe long ago, an app's space is limited to 2GB for most 32 BIT machines. I didn't retest that limitation on the 64 bit OS's.

And yes we have the /3GB switch but again the app has to be compiled with a special switch (in a Microsoft compiler) to push it the extra GB and other restrictions apply.

Bottom lime here is I moved to 64 bit years ago and lived with any issues and today have none.

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A fair point
by Jimmy Greystone / July 23, 2011 2:58 AM PDT

A fair point, but the larger point still stands, we just need to swap in 2GB where I mistakenly said 4GB.

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Spot on.
by R. Proffitt Forum moderator / July 23, 2011 5:15 AM PDT
In reply to: A fair point

Let me go out on a limb here.

If you can move to 64 bit, do it. It's time to move on.

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