Re: Usable RAM


"Paul33" <Paul33@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:D84A0026-09F9-4784-9A01-EB5C88478120@xxxxxxxxxxxxxxxx
System information (General tab) gives 3.12 GB of RAM. Why? Is this the
3GB
switch? Photoshop says that the available RAM is 1.711GB. What happened to
the other 1.4?
Surely many thousands of others (non-Mac users) have had this same
question;
is there a simple instruction to permit XP-Photoshop to use the actually
available RAM?
I read the switch article, as did my computer builder, and it seems to
apply
only to servers.

Paul
No, it is not the /3GB switch. This switch applies to the allowable user
virtual memory space.
The missing RAM can be consumed by shared memory in the graphics card.

No, you will never get to use the full 4gb virtual memory because the
operating system must
be mapped into the virtual address space. This statement applies to all
virtual memory operating
systems.

The reason that PS is reporting that value is that you do not have the /3gb
switch added. In this instance,
the user virtual memory space is 2gb , but some of this value is consumed by
necessary data structures.

As for the switch article, you both misinterpreted it. The server systems
include the PAE facility which
must be enabled by the motherboard. I don't believe that any of the PC
systems have such a motherboard.

In addition, using the 3GB switch will have no effect unless the application
supports such a change to the
operation of the program.

Jim

"Jim" wrote:


"Paul33" <Paul33@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:D4D262FB-DB17-49EA-8720-430D9C52F8BE@xxxxxxxxxxxxxxxx
XP Pro, SP2

I have 4GB RAM. XP says not. I have read the Service Note that says
why,
but
that doesn't help much. I want to assign 2GB to Photoshop, however, PS
says
that there is less than 2 available and suggest assigning no more than
1.232
Should I simply ignore this and assign 2 to PS? If not, how do I fix
this?

XP is reporting that portion of your 4 GB RAM which it can use. The rest
gets taken by such items as shared memory on the graphics card and
perhaps
non paged pool.

Of course, you can assign whatever you want, but PS will still complain
and
refuse to start.

Jim





.

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