xp doesn't see my 3gb of ram, hep me

By drugo
in Microsoft (Windows)

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ilovetech

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here a screenshot

since your available memory is more than 2GB, yet photoshop sees less then i believe you will need to move to 64bit architecture as 2GB mem per app is the limit of x86(32bit) architecture.

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neo158

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since your available memory is more than 2GB, yet photoshop sees less then i believe you will need to move to 64bit architecture as 2GB mem per app is the limit of x86(32bit) architecture.

Actually 3.25Gb is the limit of x86 architecture, however, XP has a limit of 2Gb of memory per process.

I would still recommend moving to x64 architecture simply because that is the way computers are headed, not to mention you'll need it if you plan to upgrade to 4Gb or more memory.

Edited by neo158
Experienced

ilovetech

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Actually 3.25Gb is the limit of x86 architecture, I would still recommend moving to x64 architecture simply because that is the way computers are headed, not to mention you'll need it if you plan to upgrade to 4Gb or more memory.

yes actual limit of 32bit architecture is 2^32=4GB, but the OS sees only upto 3.25GB, but for a single app limit is 2GB (http://msdn.microsoft.com/en-us/library/aa366778%28VS.85%29.aspx).

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hdood

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Actually 3.25Gb is the limit of x86 architecture, I would still recommend moving to x64 architecture simply because that is the way computers are headed, not to mention you'll need it if you plan to upgrade to 4Gb or more memory.

No, it is not. The virtual address spaces on 32-bit Windows are split half and half (2GB/2GB) between the application and the OS. To go beyond 2GB, the application has to manually map pages of memory in and out of the virtual address space, which means implementing your own memory manager. In 64-bit Windows it's 4GB/0GB for 32-bit apps, and 8TB/8TB for 64-bit apps.

Neither of them are "architectural" limits, they are Windows design limits.

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Eric Veteran

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32-bits = 4GB. If you have a 512MB video card, that has to fit in there. The OS can see all 4GB, but there's more than just your RAM that needs to use that address space. :)

hdhood's information about the 2GB partitioning is correct. There is information on how to configure your system to use 4GB tuning and large-address-aware applications here: http://msdn.microsoft.com/en-us/library/bb...28VS.85%29.aspx

It's not for the faint of heart, though.

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drugo

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yes actual limit of 32bit architecture is 2^32=4GB, but the OS sees only upto 3.25GB, but for a single app limit is 2GB (http://msdn.microsoft.com/en-us/library/aa366778%28VS.85%29.aspx).

thank all of you !

but if i use the swicht /3GB in boot.ini , could have an advantage?

maybe i could dismount 1gb of ram , and keep only 2gb of ram

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hdood

Posted
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thank all of you !

but if i use the swicht /3GB in boot.ini , could have an advantage?

You could do that, yes. Assuming Photoshop supports it. The only issue is that it reduces the operating system's part of the address space to just 1GB, which is not that much on modern systems. You can always just try it and see how it goes. Did you look into if Photoshop has any memory mangement settings?

maybe i could dismount 1gb of ram , and keep only 2gb of ram

What would that accomplish other than giving the system 1GB less to work with? It's not like having the extra GB there hurts anything just because PS can't use it (because Adobe is poop).

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drugo

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You could do that, yes. Assuming Photoshop supports it. The only issue is that it reduces the operating system's part of the address space to just 1GB, which is not that much on modern systems. You can always just try it and see how it goes. Did you look into if Photoshop has any memory mangement settings?

thanks

yes photshop can see more then 2gb but it's the only program

What would that accomplish other than giving the system 1GB less to work with? It's not like having the extra GB there hurts anything just because PS can't use it (because Adobe is poop).

because i can't see a benefit ,a gain having 3gb of ram

Experienced

ilovetech

Posted
Posted
Well, it could be used by another program running at the same time. The point is that it doesn't hurt and does no damage. Removing it won't do anything useful. It won't improve performance or anything.

exactly, it will be useful for OS.

since if you use 3gb virtual address space for app & 1Gb for OS, then with only 2GB physical memory OS will also share it, it will be a net loss for photoshop.

if even /3gb switch doesn't works, you can try photoshop CS4 that does some memory management. best you move to x64.

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