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        CPU Loading - Photoshop & iTunes
        L2 Cache
        L3 Cache
        Time, Sec.
        Reference Apple Systems
        PM G4/350 AGP Graphics (Sawtooth)
        1024k
        0MB
        2625
        PM G4/400 Gigabit Ethernet
        1024k
        0MB
        2162
        PM G4/450 Gigabit Ethernet
        1024k
        0MB
        1918
        PM G4/500 AGP Graphics (Sawtooth)
        1024k
        0MB
        1667
        PM 2x G4/450 Gigabit Ethernet
        1024k x2
        0MB
        1076
        eMac G4/700MHz
        256k
        0MB
        1435
        Acceleration Cards
        GigaDesigns G-Celerator G4/800MHz
        256k
        2MB SPB SRAM
        1211
        OWC Mercury Extreme G4/800MHz
        256k
        2MB SPB SRAM
        1211
        PowerLogix PowerForce G4/800MHz
        256k
        2MB SPB SRAM
        1254
        Sonnet Encore/ST G4/800MHz
        256k
        2MB DDR SRAM
        1240
        GigaDesigns G-Celerator G4/1GHz
        256k
        2MB SPB SRAM
        1072
        GigaDesigns G-Celerator G4/1GHz (@ 1.2GHz)
        256k
        2MB SPB SRAM
        943
        Sonnet Encore/ST G4/1GHz
        256k
        2MB DDR SRAM
        1014
        PowerLogix PowerForce G4/1.2GHz
        256k
        2MB SPB SRAM
        935
        Sonnet Encore/ST G4/1.2GHz
        256k
        2MB DDR SRAM
        911
        GigaDesigns G-Celerator G4/1.25GHz
        256k
        2MB DDR SRAM
        805
        OWC Mercury Extreme G4/1.25GHz
        256k
        2MB DDR SRAM
        805
        OWC Mercury Extreme G4/1.3GHz
        256k
        2MB DDR SRAM
        795
        GigaDesigns G-Celerator G4/1.4GHz
        256k
        2MB DDR SRAM
        862
        OWC Mercury Extreme G4/1.4GHz
        256k
        2MB DDR SRAM
        842
        PowerLogix PowerForce 2x900MHz
        256k x2
        2MB SPB SRAM x2
        701
        PowerLogix PowerForce 2x1.0GHz
        256k x2
        2MB SPB SRAM x2
        660
        PowerLogix PowerForce 2x1.2GHz (@ 1.3GHz)
        256k x2
        2MB SPB SRAM x2
        525

        Time to execute Photoshop 7 test script while iTunes visuals are running full screen in the background. All times in seconds, shorter bars are better.

        The above test is a seriously difficult task for any processor to run. If you wish to duplicate it, this is what is involved. I would use caution - this CAN AND WILL overheat processors.

        If you have problems with your machine locking up while running this test, investigate the thermal bond between the heatsink and processor - this will stress your computer more than anything!

        • Set your monitor's resolution to 1280x1024, millions of colors.
        • Open iTunes and play a song. For this test I chose a 10 minute live version of a Rolling Stones track, and had it repeat in a loop so all of the processors tested in this series would be having the same visual patterns displayed.
        • Some of the iTunes visuals differ in CPU load, and this levels the playing field, so to speak.
        • Expand the iTunes window to fill the screen
        • Activate the visual effects, at full screen resolution.
        • Open Photoshop
        • Select the action script to run, and start the stopwatch.

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