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anthraxbass
Journeyman III

What runs faster/more efficient?

I have AMD Athlon 2 cpu.

• 32-bit application under 64-bit OS 

OR

• the same 32-bit app under 32-bit OS?

picture illustration attached.

To be more specific - I wonder if the cpu emulates 32-bit environment for 32-bit OS more efficiently than

64-bit OS emulates compatibility mode for the same 32-bit app ?

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3 Replies
mike_
Journeyman III

Depends on the application of course.

But the difference should be only marginally.

Little bit more info would be helpfull as well.

Mike

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This is a theoretical question 🙂 I don't have an application.

Does the CPU emulate 32-bit environment for 32-bit OS more efficiently than

64-bit OS emulate compatibility mode for the same 32-bit app ?

You say, that the efficiency that I'm speaking of (above, in the quote) can only be measured by special test-case application?

Let's say that I'm speaking of SUN JVM 1.6.0 32-bit, the linux version

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Just in case it's helpful, AMD has Athlon specific forums: http://forums.amd.com/forum/index.cfm?FTVAR_SUBCAT=20&nocookies=y&subcatname=Desktop%20Products%20%2...

Cheers!

Kristen

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