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        CPU Loading - Photoshop & iTunes
        L2 Cache
        L3 Cache
        Time, Sec.
        Reference Apple Systems
        PM G4/466MHz Digital Audio
        1024k
        0MB L3
        1695
        PM G4/733MHz QuickSilver
        256k
        0MB L3
        1385
        PM G4/867MHz QuickSilver
        256k
        2MB, SDRAM
        1000
        PM 2x G4/1GHz QuickSilver 2002
        256k x2
        2x 1MB, DDRAM
        545
        PM 2x G4/867MHz Mirrored Drive Door
        256k x2
        2x 1MB, DDRAM
        598
        PM 2x G4/1GHz Mirrored Drive Door
        256k x2
        2x 1MB, DDRAM
        498
        PM G4/1GHz (MDD) FireWire 800
        256k
        1MB, DDRAM
        900
        PM 2x G4/1.25GHz (MDD) FireWire 800
        256k x2
        2x 1MB, DDRAM
        433
        PM 2x G4/1.42GHz (MDD) FireWire 800
        256k x2
        2x 1MB, DDRAM
        374
        PM G5/1.6GHz
        512k 1:1
        0MB L3
        582
        PM G5/1.8GHz
        512k 1:1
        0MB L3
        519
        PM 2x G5/2.0GHz
        512k 1:1
        0MB L3
        285
        Acceleration Cards
        GigaDesigns G-Celerator G4/800MHz
        256k
        2MB SPB SRAM
        1101
        OWC Mercury Extreme G4/800MHz
        256k
        2MB SPB SRAM
        1097
        PowerLogix PowerForce G4/800MHz
        256k
        2MB SPB SRAM
        1140
        Sonnet Encore/ST G4/800MHz
        256k
        2MB DDR SRAM
        1125
        GigaDesigns G-Celerator G4/1GHz
        256k
        2MB SPB SRAM
        876
        GigaDesigns G-Celerator G4/1GHz (@ 1.2GHz)
        256k
        2MB SPB SRAM
        736
        Sonnet Encore/ST G4/1GHz
        256k
        2MB SPB SRAM
        940
        PowerLogix PowerForce G4/1.2GHz
        256k
        2MB DDR SRAM
        823
        Sonnet Encore/ST G4/1.2GHz
        256k
        2MB SPB SRAM
        826
        GigaDesigns G-Celerator G4/1.26GHz
        256k
        2MB DDR SRAM
        791
        OWC Mercury Extreme G4/1.26GHz
        256k
        2MB DDR SRAM
        779
        OWC Mercury Extreme G4/1.33GHz
        256k
        2MB DDR SRAM
        690
        GigaDesigns G-Celerator G4/1.4GHz @ 1.467GHz
        256k
        2MB DDR SRAM
        668
        OWC Mercury Extreme G4/1.467GHz
        256k
        2MB DDR SRAM
        643
        PowerLogix PowerForce 2x867MHz
        256k
        2MB DDR SRAM
        648
        PowerLogix PowerForce 2x933MHz
        256k x2
        2MB SPB SRAM x2
        588
        PowerLogix PowerForce 2x1.0GHz
        256k x2
        2MB SPB SRAM x2
        576
        PowerLogix PowerForce 2x1.2GHz
        256k x2
        2MB SPB SRAM x2
        532
        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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