Memory versus Windows

  • Thread starter Thread starter Mike J
  • Start date Start date
M

Mike J

I'm running a WinXP based setup with an Epson Perfection 3170 Photo. I
am learning that Windows places some sort of limit on usable RAM.
Something about it won't let you use more than 256 MB? I've got 512 MB
installed on my machine. When I try to scan hi resolution pictures, I
rapidly run out of memory. Is there a way to force Windows to use more
of my installed RAM? Is there a way to force the Epson TWAIN to spool
to on of my two hard drives? Is there another work around that anyone
knows about?
 
XP can use 3 or 4 GB, I forget.
Apps are limited to 2GB max each.
My guess is you are running OUT of RAM.

What resolution are you scanning at? (size and ppi).
What error do you get?
Do you have lots of HD space free?

And, btw, if you are using Photoshop, you need to give PS only 75% of
available RAM, max. Some machines with PS CS have to lower it to 50%.

Mac
 
I'm running a WinXP based setup with an Epson Perfection 3170 Photo. I
am learning that Windows places some sort of limit on usable RAM.
Something about it won't let you use more than 256 MB? I've got 512 MB
Click to expand...

When I was running 512 the system was page file swapping most of the
time. The difference when I went to one gig was tremendous.

XP can probably run more memory than you can fit on your motherboard.
installed on my machine. When I try to scan hi resolution pictures, I
rapidly run out of memory. Is there a way to force Windows to use more
of my installed RAM? Is there a way to force the Epson TWAIN to spool
Click to expand...

Give it more memory to use<:-))
512 just isn't enough unless you run absolutely nothing else and the
minimum of system apps.

Start the Task manager and take a look at what the processes are
using. Then look at the apps, and performance.

I run XP Pro, on 1 Gig of RAM (2.8XP Plus Athlon) while running
Agent, Mozilla Firefox, Outlook Express, Photoshop Elements, Vuescan,
and MS Word all at the same time.

I have to be careful with all of those or it can easily start page
file swapping again. I'm going to wait on more memory until I build
up a dual processor system with about 4 Gig of ram and some larger
hard drives. I currently have just shy of 400 Gig on this machine.

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com
 
Mike J said:
I'm running a WinXP based setup with an Epson Perfection 3170 Photo. I
am learning that Windows places some sort of limit on usable RAM.
Something about it won't let you use more than 256 MB?
Click to expand...

Two issues:
Firstly, Windows 9x/ME all have a flawed memory allocation system that won't
let any single process take more than 256MB of contiguous ram, even if
there's more physical ram available. This bug does not exist in NT4/2000/XP.

Secondly, if you work with big images, then you need to increase the virtual
memory (swap) space to at least the same as your physical memory, or more if
possible, say double. For XP, 256MB ram should be considered the minimum.
512MB is better.


--
regards,
Stewart DIBBS
========================================
Developer of the FreePiXCL 4.48
PiXCL 5 and geoPiXCL 5 Image Processing Languages
for Windows 2000/XP
www.vysor.com Gatineau, Quebec, CANADA
========================================
 
|
| | > I'm running a WinXP based setup with an Epson Perfection 3170 Photo. I
| > am learning that Windows places some sort of limit on usable RAM.
| > Something about it won't let you use more than 256 MB?
|
| Two issues:
| Firstly, Windows 9x/ME all have a flawed memory allocation system that
won't
| let any single process take more than 256MB of contiguous ram, even if
| there's more physical ram available. This bug does not exist in
NT4/2000/XP.
|


Please cite a reference for the above statement. I've read that Windows ME
can use up to 1GB of memory. The only problem I've ever seen documented is
that when you use 512MB or larger memory, you have to set a maximum limit
on "vcache".


|
.....snip|
|
| Stewart DIBBS
|

Jean
 
|
| | > I'm running a WinXP based setup with an Epson Perfection 3170 Photo. I
| > am learning that Windows places some sort of limit on usable RAM.
| > Something about it won't let you use more than 256 MB?
|
| Two issues:
| Firstly, Windows 9x/ME all have a flawed memory allocation system that
won't
| let any single process take more than 256MB of contiguous ram, even if
| there's more physical ram available. This bug does not exist in
NT4/2000/XP.
|


Please cite a reference for the above statement. I've read that Windows ME
can use up to 1GB of memory. The only problem I've ever seen documented is
that when you use 512MB or larger memory, you have to set a maximum limit
on "vcache".
Click to expand...

Correct.
Same with Win98/98SE/ME.
Designed to use 1GB total memory, but need

[vcache]
MaxFileCache=whatever (I'm using 131072 currently)

statement in system.ini to keep the OS from wasting the additonal RAM.

Mac
 
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