We were impressed with the 24-inch iMac's This allows them to transfer data to and from the computer's memory subsystem quicker than ever, resulting in faster operations. We've grown to love the new Penryn version of the chip, which have 6MB of cache memory - compared to just 4MB on the old ones - and a faster front-side bus, 1,066MHz instead of 800MHz. The 20-inch models use either 2.4GHz or 2.66GHz Core 2 Duo CPUs, while the 24-inch models use either 2.8GHz or 3.06GHz Core 2 Duos, depending on how much you're willing to pay. A wireless Bluetooth keyboard is also available, but that does not include any USB ports. One of these will permanently be dedicated to the accompanying Mighty Mouse - which is nowhere near as good as a Microsoft mouse, by the way - leaving the other free for connecting a USB key or digital camera. Happily, most does not mean all - the wired keyboard, which connects via USB, comes with two USB port of its own. The location of these ports is slightly inconvenient, seeing as you'll have to physically turn the machine around or get up and peer round the back to connect or disconnect most of your peripherals. The rear is also home to a single FireWire port, four USB ports, a mini-DVI video output port, plus headphone and line-in jacks. All the other bits - like the power button - are round the back.
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