CS3 is quite a bit faster on Intel Macs if you have huge files, like if you have a D2x or a 1DsM2, or if you open up your 350D/400D/20D/30D/D40/D50/D80 pics in “larger size” settings in Camera Raw, and if you use complicated filters on the entire image…

Rob Galbraith DPI: The Photoshop CS3 beta by the numbers

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