U of S | Mailing List Archive | alt-photo-process-l | Re: Windows Vista, not quite alt

Re: Windows Vista, not quite alt

It is a bit more complicated than that :-(

The 4 gig maximum installed memory is due to the biggest number expressible in 32 bits being about 4 billion (actually 4294967296 ). As each memory element must be accessed using a unique number there can only be 4 billion address elements (known as the address space). Unfortunately this address space is shared with your graphics card and other peripherals. To be safe Windows (XP and Vista) actually limits applications to access 2 gig each, the remainder reserved for those peripherals and Windows itself. Some applications (I am pretty sure Photoshop is one of them) can be made to access up to 3 gig but only if you fiddle with system files to use the so-called 3gb switch. Google it if you are interested. Be warned that this may conflict with badly behaved installed hardware which expects to have that space to itself. Suck it and see.

All this does not mean that all the extra RAM above 2 gig is wasted. If you have more than one application running their combined memory allocation may be above 2 gig but limited to a max of 2 gig per application. The total can never be the full 4 gig however as the aforementioned graphics cards etc still need their piece of the pie.

Hope that is slightly clearer than mud.


Robert Hall wrote:
Can Vista use all 4 gig?

I know XP can only access 3 gig even with 4 installed.


On Mon, Aug 25, 2008 at 12:04 PM, Jeremy Moore <jeremydmoore@gmail.com <mailto:jeremydmoore@gmail.com>> wrote:


I had to be switched back to WinXP due to some legacy hardware
issues, but I was running Photoshop CS3 in Vista with 4gb of RAM
without any problems. We have another computer in the lab with
only 2gb of RAM that would start to slow down quite a bit. This
was on files in the 300mb range.


On Mon, Aug 25, 2008 at 12:44 PM, Marek Matusz
<marekmatusz@hotmail.com <mailto:marekmatusz@hotmail.com>> wrote:

Dear list,
Is anybody running Photoshop (CS3) under Vista. I am looking
for a memory recommendation for a smooth operation.

Get thousands of games on your PC, your mobile phone, and the
web with Windows®. Game with Windows

Robert Hall
www.RobertHall.com <http://www.RobertHall.com>
No virus found in this incoming message.
Checked by AVG - http://www.avg.com Version: 8.0.138 / Virus Database: 270.6.6/1627 - Release Date: 22/08/2008 06:48