Xpostfacto mac6/28/2023 ![]() nVidia GeForce 6800 Ultra DDL, 6800 GT DDLįor the clearest explanation of how Core Image works that I've encountered, see John Siracusa's thorough review of OS 10.4 Tiger on Ars Technica: When a programmable GPU is present, Core Image utilizes the graphics card for image processing operations, freeing up the CPU for other tasks, which can improve real-time responsiveness across a wide variety of operations.Ĭore Image-capable graphics cards include: ![]() OS 10.4 Tiger requires a programmable graphics processing unit (GPU) in order to take a full advantage of its Core Image graphics technology, and if no GPU (Radeon 9600 or nVidia GeForce FX Go 5200 or better) is present, some of the graphics support load will be shunted to the CPU, which has to slow everything down, and in my observation also makes the processor run hotter.Ĭore Image and Core Video are powered by floating-point calculations, which can produce extremely fine color accuracy on a pixel-by-pixel basis. Sometimes the optimum OS version is a moving target. I'm holding off upgrading my own Pismo from OS 10.4.1 due to a printer driver issue that's manifested on the iBook in 10.4.2, but I'm hoping that when that's resolved I will realize some speed gaIns there as well. However, I have noticed a significant speed boost on the iBook after installing the OS 10.4.2 update, and have reader reports that it seems zippier on G3 Pismos too, so it looks like Apple has worked some optimization magic with the update that makes it a livelier performer on these older, slower machines. My 700 MHz G3 iBook now outperforms it, presumably by virtue of having twice as much video RAM and a video card that supports Quartz Extreme. It's not horrible, but it is sluggish by comparison. For example, was quite satisfied with the performance of my 550 MHz G4 upgraded Pismo running OS 10.3, but am much less so running Tiger. If you're really determined, you can probably get Tiger to install on some older PowerBooks using Ryan Rempel's XPostFacto installer hack, but is it worth the trouble? Given the lazy performance of Tiger on even some supported machines, I'm doubtful. For example, PowerBooks prior to the G3 Series Pismo, which was introduced in March, 2000, are not supported by OS X 10.4. The appropriate operating system to use on any computer depends upon variables like the speed of your machine, how much RAM you have, what you use the computer for, and how much performance (speed) you're willing to trade off in order to have more advanced features. There is no all-purpose boilerplate answer. The operative queries lately tend to be about whether it makes sense to install Tiger on a marginally supported (or unsupported) older Mac, or what is the minimal machine that will support Tiger adequately. Questions I get asked fairly frequently, and particularly since the release of OS 10.4 Tiger, are variations on the general theme of upgrading older Macs to more recent operating system versions. What's The Ideal Mac OS Version For Your 'Book? - Plus PowerBook Mystique Mailbag ![]() Home > Columns > Charles Moore The PowerBook Mystique
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