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Available RAM & scratch disk in Photoshop

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  #1  
Old 10-21-2007, 03:42 PM
jmhinchey jmhinchey is offline
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Available RAM & scratch disk in Photoshop

I just got a Mac with 8 gigs of RAM. Why would it only show 3072 MB available under performance? Also, I have a 2nd hard drive with 465 G set up as the scratch disk so why does it only show 1.78 G in info?
Thanks for any help.
Mary

Last edited by jmhinchey; 10-21-2007 at 04:38 PM.
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Old 10-21-2007, 05:59 PM
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Swampy Swampy is offline
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Re: Available RAM & scratch disk in Photoshop

JM, where are you looking when you get this information? Apple System Profiler? Disk Utility? Intel Mac?

BTW, 465GB is overkill for a Photoshop scratch disk. I'd partition that puppy and use the bulk of it as a backup disk. Give PS 50GB for scratch disk and use the rest for storage or backup.
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Old 10-21-2007, 06:39 PM
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D Thompson D Thompson is offline
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Re: Available RAM & scratch disk in Photoshop

In windows you have to set the 3gb switch in the boot.ini for PS to see the extra memory over 2GB. You might try searching to see if Mac has something similar. This may be an entirely stupid suggestion since I know absolutely zilch about a Mac.
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Old 10-23-2007, 03:09 PM
jmhinchey jmhinchey is offline
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Re: Available RAM & scratch disk in Photoshop

Hi Swampy,
You are so right about the scratch disk. Just haven't gotten around to partitioning.
I actually found a great article on Adobe...http://kb.adobe.com/selfservice/view...1089&sliceId=1
for optimizing performance.
Thanks for your input.
Mary
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Old 10-23-2007, 03:36 PM
pixelzombie pixelzombie is offline
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Re: Available RAM & scratch disk in Photoshop

Quote:
Originally Posted by jmhinchey View Post
I just got a Mac with 8 gigs of RAM. Why would it only show 3072 MB available under performance? Also, I have a 2nd hard drive with 465 G set up as the scratch disk so why does it only show 1.78 G in info?
Thanks for any help.
Mary
until OS X becomes a 64-bit operating system, you'll be limited to about 4 gig of memory as the maximum useable amount....Leopard may change that, but i don't think CS3 is optimized for 10.5 yet...
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Old 10-23-2007, 04:15 PM
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Swampy Swampy is offline
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Re: Available RAM & scratch disk in Photoshop

I'm quoting from the Apple page about Mac Pros. Smoke 'em if you got 'em.

************
Inside each Mac Pro reside either two Quad-Core or two Dual-Core Intel Xeon processors. Running at up to 3.0GHz, they bring industry-leading 64-bit performance to every Mac Pro.
Dual-Core Intel Xeon Processor
8-core or quad-core. It's all Xeon.

Based on Intel’s Core microarchitecture and designed for systems with multiple processors, the two 64-bit Quad-Core Intel Xeon “Clovertown” processors in the new 8-core Mac Pro set a blistering 3GHz pace.

And the 64-bit Dual-Core Intel Xeon “Woodcrest” processors that power the quad-core Mac Pro run at clock speeds of 2.0GHz, 2.66GHz, or 3.0GHz. That translates to up to 2x the performance of the Power Mac G5 Quad.1
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Old 10-23-2007, 04:27 PM
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Photo678 Photo678 is offline
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Re: Available RAM & scratch disk in Photoshop

Quote:
Originally Posted by jmhinchey View Post
I just got a Mac with 8 gigs of RAM. Why would it only show 3072 MB available under performance? Also, I have a 2nd hard drive with 465 G set up as the scratch disk so why does it only show 1.78 G in info?
Thanks for any help.
Mary


what kind of mac?...it might be limited to only 3gigs of ram, also, what os incarnation are you running?
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Old 10-24-2007, 01:35 PM
jmhinchey jmhinchey is offline
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Re: Available RAM & scratch disk in Photoshop

It's a Mac Pro 2x3 GHz Dual-core Intel Xeon
8 GB 667 MHz DDR2
OS X Version 10.4.10
I was getting tired of my old PC not being able to keep up.
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Old 10-24-2007, 04:13 PM
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Photo678 Photo678 is offline
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Re: Available RAM & scratch disk in Photoshop

ok, you might have some funky ram in there then....i would either double check to make sure the ram is seated properly, double check in the activity monitor (under applications>utilities) to make sure there is actually 8 gigs in there, and, if purchased directly from apple....call them up. you get a few weeks of complimentary telephone support with your purchase through them....if you bought from a reseller, call them up instead.


EDIT: now, rereading your op, you asked "....available under performance".....i would think maybe, you are reading the "free" section, but can't imagine your puter using 4gigs of ram for the system and open apps....*see image

http://dznr.org/79i8
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Old 10-24-2007, 04:44 PM
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Re: Available RAM & scratch disk in Photoshop

I picked this info up over on Mac Resource..

********


Intel 64 bit support is problematic on low end Macs. Core Duo processors do have support for 64 bit functions but with these processors, the motherboards to not support addressing more than 2 GB of RAM. The current MacBook and mini with Core 2 Duo processors will address only 3.3 GB of RAM even with 4 GB installed. It is the Intel hardware that is at fault and not an Apple design problem.
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