Allocating RAM in Leopard on new Mac Pro

I have a new Mac Pro (early 2008) with Mac OS 10.5.1 and Photoshop CS3 10.0.1.
I just installed 8-GB of RAM (which shows up in About This Mac).
In Photoshop > Preferences > Performance, the dialog box says under Memory Usage...
Available RAM: 3072 MB
Ideal Range: 1689-2211 MB
Let Photoshop Use: 2764 MB (90%) - [which I have manually set so far]
My questions...
(1) Why is Available RAM not closer to the 8-GB I have installed? Available RAM based on what? If I had 32-GB installed would this still show Available RAM 3072? I thought Photoshop could be assigned 4-GB?
(2) Ideal Range based on what?
Thanks.

>What Allen said. Above 3GB installed PS CS3 will use memory for scratch which speeds things up. I have mine set at 94% after some testing.
I have it up to 100% and that makes it fly with Forced VM Buffering plug in installed 9 GB of RAM and a internal stripe RAID made up of two of the four internal hard disk It is also equally important to have fast hard drives. The newer hard drives with 32MB cache are much faster than the older models. Use those to make a raid and see what happens.

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http://www.macworld.com/article/1165672/add_usb_3_0_to_a_mac_pro_with_highpoints _rocketu.html
50-50 here:
http://www.amazon.com/HighPoint-RocketU-Quad-USB-3-0/product-reviews/B005K8AXN6
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This general-purpose article gives detailed step-by-step instructions for using Migration assistant, Setup Assistant, and other mehtods, and discusses the Pros and cons of each mtheod. It is very approachable and easy to understand. Wriiten by Pondini, the resident Time Machine guru.
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RAM PREVIEW VERY SLOW (FAR FROM REAL TIME) ON NEW MAC PRO

Good afternoon
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Attached below you can see some screenshots from the settings I have on AE CC

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For what it is worth, I recently went through this drama.
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See if you can buy from a seller who will let you test this out. There are some nice retailers out there, especially when you are dropping $1000s on a new Mac Pro.
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Can I put an older OS (Leopard) on a new Mac Pro?

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Melanie

Melanie Dupre wrote:
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We often need to access a lot of archived FreeHand files and are wondering whether we should keep an old G4 tucked away just for this job when we next update our Macs.
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Hi jona;
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Be grateful.
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Your OEM DVD has Apple Hardware Test.
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Hi,
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An interesting side note, iPhoto with 140GB library works great.
Mac Pro 2.8, 2GB, 320GB Drive, 130GB Aperture Library, Leopard 10.5.1
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Chris-
Unfortunately Apple reps are seldom good counselors as regards application performance. They are after all retail sales people, not users. Better advice is available from user forums typically populated by folks with years of real-world usage experience as well as education beyond that typically found in retail sales.
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I go with coffee can, create an account to go towards the next system. Put X-amount aside each month and only buy on cash or your business pays for itself in six months.
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http://store.apple.com/us/product/FC560LL/A
Your 8-core 2,8 is not yet ready to retire!

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All sw was clean install on the new machine.
Anyone else experiencing or have suggestions?
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Putting the Project file on another drive does ZERO for performance. Keep it on your system drive.
Trash preferences
Use Disk Utility to Repair Permissions
Remove your RAM and see if you still have issues.
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Shane

Allocating RAM in Leopard on new Mac Pro

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