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Message: <blockquote data-quote="Martin Thomas" data-source="post: 1320113" data-attributes="member: 8214">Is it possible you had other applications running in the background which were accessing your memory? Many new utilities and applications now remain resident and leech at the system just in readiness to be used, perhaps because modern computers now have much more in the way of resources at their disposal. I'd be tempted to check the Start Up list (Run>config.sys) to see if any of the unimportant elements can be switched off.Photoshop's ability to undo and redo states when working on an image also means it utilises an additional amount of memory for each step you perform (e.g. open size 55Mb, apply levels and the image size jumps to 110Mb). Even when the image is closed this temporary image is held (usually on the hard drive) until Photoshop is closed so it's advisable to close the application then restart it before opening another image.Windows (XP?) typicaly uses 250mb of memory to sit there and simply exist so in your case I'd allocate 75-80% of the available memory for use by the application. 1200Mb is a reasonable amount of RAM but the demands of larger image sizes (typically from higher megapixel cameras delivering RAW files) mean 2Gb+ is needed (especially if the PC has an onboard graphic card).Is your new RAM definitely working? (Right click My Computer>Properties). Sometimes adding an additional strip can cause isues with the existing.However, all this said it doesn't really explain why images are opening in Elements without problems.</blockquote>

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