Andrew Morton writes:
Andrew> wrote:
Toke Eskildsen writes:
wrote>
Thank you. It led me to information that on my computer, under 32 bit XP, the system can only use the 2gb I have.
Toke> The page says it can use 3GB for some systems, with a minor tweak>
Toke> "Photoshop CS2 is a 32-bit application. When it runs on a
32-bit Toke> operating system, such as Windows 2000 and Windows XP Professional, it Toke> can access the first 2 GB of RAM on the computer.The operating system Toke> uses some of this RAM, so the Photoshop Memory Usage preference Toke> displays only a maximum of
1.6 or 1.7 GB of total available RAM. If you Toke> are running
Windows XP Professional with Service Pack 2, you can set Toke> the 3 GB switch in the boot.ini file, which allows Photoshop to use up
Toke> to 3 GB of RAM."
Yes, but my system can only use 2gb under XP Pro. So I cannot take advantage of the /3gb flag that PS will use. This is a pity.
Andrew> Yes you can.
Andrew>
http://blogs.msdn.com/oldnewthing/archive/2004/08/22/218527. aspx I must be writing very poorly. My system, a Dell XPS 600, cannot use more than 2gb due to a chipset limitation. I understand that on a system that does recognize 4gb, that Photoshop can use more than 2gb.
Andrew> Note that, just to complicate things, if you install 4GB of RAM then Windows Andrew> cannot access all of it because of memory-mapped IO space for things like Andrew> video cards. For example, if you have a video card with 256MB of RAM then Andrew> that is mapped into the 4GB address space, meaning that 256MB of the system Andrew> RAM is, effectively, hidden.
Andrew> I suggest adding RAM in matched pairs if you have a motherboard which can Andrew> access the RAM with dual channels.
Andrew> HTH
Andrew> Andrew
—
Andrew Hall
(Now reading Usenet in comp.graphics.apps.photoshop…)