32-bit CS4 and Memory Under Vista x64

BS
Posted By
Brad_Steinagel
Feb 28, 2009
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293
Replies
4
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Closed
Hello,

I was wondering if the 32-bit version of Photoshop CS4 can access more than 4 GB of memory if it’s running under Vista x64. I’m not sure where the 4 GB limitation enters the picture–if it’s the operating system or the application itself.

I’ve tried to use CS4 x64 as much as possible, but there aren’t a lot of plug-ins available for it yet, necessitating the use of the 32-bit version at times.

Thanks,
Brad Steinagel
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32-bit bit memory windows x64

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Chris_Cox
Feb 28, 2009
No, a 32 bit application can only address up to 4 Gig of RAM. Any additional RAM in the system can be used by the OS for disk caching, which will help performance a bit.

4 Gig enters the picture because that is the maximum value/memory address representable in 32 bit integers/pointers.
BS
Brad_Steinagel
Feb 28, 2009
Thanks for your explanation Chris. I kind of thought the answer would be no but wasn’t sure.

Brad
JJ
John Joslin
Mar 1, 2009
You could have looked in Preferences > Performance too!
JH
Joarna_Huming
Mar 1, 2009
Well that does it, I’m upgrading to 64bit now, things were running too slow. Thanks.

Regards,
Joarna
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