CS5 - Optimizing Performance

[Axel Hildebrandt]

Some of the suggestions seem quite useful: http://macperformanceguide.com/OptimizingPhotoshopCS5-Intro.html

[William Malacarne]

Axel

Hope you don't mind but here is one also for Windows,

http://kb2.adobe.com/cps/404/kb404439.html#ram%2064

Bill

[Axel Hildebrandt]

Axel

Hope you don't mind but here is one also for Windows,

http://kb2.adobe.com/cps/404/kb404439.html#ram%2064

Bill

It's great to have information for both platforms.

[Alfred Forns]

Thanks for the link Axel !! btw running 32 bit till the plug ins are ready :( Don't like switching back and forth !!!

[Axel Hildebrandt]

Thanks for the link Axel !! btw running 32 bit till the plug ins are ready :( Don't like switching back and forth !!!

I left CS4 on my computer to use plugins and have CS5 running in 64-bit mode. I read that CS5 can use only 2.1GB RAM in 32-bit mode which is even less than in CS4.

[Michael Pancier]

Does CS5 automatically start in 64 bit? How can you tell how it's running?

[Joerg Rockenberger]

Does CS5 automatically start in 64 bit? How can you tell how it's running?

From Adobe:
How to run Photoshop CS5 in 32-bit and 64-bit modes
To run Photoshop CS5 on Mac OS as a 32-bit application:

Select the Adobe Photoshop CS5 application file, installed by default in the Applications/Adobe Photoshop CS5 folder.
Choose File > Get Info, and select Open in 32 Bit Mode.

Deselect this option to run Photoshop CS5 in 64-bit mode.

[Axel Hildebrandt]

Does CS5 automatically start in 64 bit? How can you tell how it's running?

If your processor supports 64-bit, CS5 will run in 64-bit mode by default. You can also go to the Activity Monitor to check which applications run in 64-bit.

[Marc Mol]

I left CS4 on my computer to use plugins and have CS5 running in 64-bit mode. I read that CS5 can use only 2.1GB RAM in 32-bit mode which is even less than in CS4.

Depends what Windows version you have Axel

This table lists the amount of RAM available to Photoshop with the different versions of Windows:
<table class="data-bordered" width="100%"><tbody><tr><td class="cellrowborder" valign="top">Photoshop Version</td> <td class="cellrowborder" valign="top">Windows Version</td> <td class="cellrowborder" valign="top">Maximum amount of RAM that Photoshop can use</td> </tr> <tr><td class="cellrowborder" valign="top">32-bit</td> <td class="cellrowborder" valign="top">32-bit</td> <td class="cellrowborder" valign="top">1.7 GB</td> </tr> <tr><td class="cellrowborder" valign="top">32-bit</td> <td class="cellrowborder" valign="top">64-bit</td> <td class="cellrowborder" valign="top">3.2 GB</td> </tr> <tr><td class="cellrowborder" valign="top">64-bit</td> <td class="cellrowborder" valign="top">64-bit</td> <td class="cellrowborder" valign="top">as much RAM as you can fit into your computer</td></tr></tbody></table>

[Axel Hildebrandt]

Depends what Windows version you have Axel

This table lists the amount of RAM available to Photoshop with the different versions of Windows:
<table class="data-bordered" width="100%"><tbody><tr><td class="cellrowborder" valign="top">Photoshop Version</td> <td class="cellrowborder" valign="top">Windows Version</td> <td class="cellrowborder" valign="top">Maximum amount of RAM that Photoshop can use</td> </tr> <tr><td class="cellrowborder" valign="top">32-bit</td> <td class="cellrowborder" valign="top">32-bit</td> <td class="cellrowborder" valign="top">1.7 GB</td> </tr> <tr><td class="cellrowborder" valign="top">32-bit</td> <td class="cellrowborder" valign="top">64-bit</td> <td class="cellrowborder" valign="top">3.2 GB</td> </tr> <tr><td class="cellrowborder" valign="top">64-bit</td> <td class="cellrowborder" valign="top">64-bit</td> <td class="cellrowborder" valign="top">as much RAM as you can fit into your computer</td></tr></tbody></table>

I have Mac OSX (Snow Leopard) running in 64-bit mode, the numbers are a bit different than with Windows. In 32/32 bit it's a bit over 3GB (CS4), with CS5 in 32bit it's 2.1 and in 64bit as much RAM as available.