

The hard-drive capacity, optical drive, and installed RAM remain the same (though the new models support up to 2GB of memory). Today, that same $1,299 gets you a 17-inch model with a 1.6GHz G5 chip and an Nvidia GeForce FX 5200 Ultra graphics card.

Just a few weeks ago, $1,299 bought you a 15-inch iMac with a 1GHz PowerPC G4 chip, 256MB of RAM (with the option to add up to 1GB), an 80GB hard drive, an Nvidia GeForce4 MX graphics processor, and a CD-RW/DVD-ROM Combo drive. * Comparison Shopping: While we’re stacking up the new iMacs to their older G4-power counterparts, consider this. That September 2003 article gives a detailed explanation (just skip down to the “A Chip’s Story” section), but the Cliff’s Notes version is basically: faster clock speeds, 64-bit processing, and a more efficient system architecture boosts performance even further. How differently the two PowerPC generations perform.
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Back when Apple first add the G5 to its Power Mac line, Macworld explained Apart from the fact that clock speeds have been boosted to 1.6GHz and 1.8GHz (depending on configuration) from 1GHz and 1.25GHz and that the system bus has been upped to 600MHz from 167MHz, the iMac now runs on a G5 processor as opposed to a G4 chip.
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* Speed Demon: We won’t be able to say exactly how fast these new models are compared to the older iMac until Macworld Labs gets a crack at them, but I’d assume we’re going to see a significant performance improvement.
