![]() I never once heard the iMac Core Duo's fan spin up, not even during my CPU intensive H.264 encoding tests. ![]() Both iMacs were virtually silent during operation, although for whatever reason, the iMac G5's fan would sometimes spin at full speed upon startup. In fact, the iMac in general is extremely quiet, regardless of whether you have a PowerPC or Intel based model. Despite being a desktop drive, it's just as silent as what you'd find in a notebook. In the case of my test sample, it was a Western Digital WD1600JS drive with a 160GB capacity. Unlike a Core Duo notebook, however, the iMac does use a standard 3.5" SATA hard drive. The iMac basically uses the same type of Core Duo motherboard that you might find in a notebook complete with Intel's 945 Express chipset, although Apple appears to have used their own wireless adapter. ![]() Two identical iMacs, two different processors ![]() The only differences really are on the motherboard itself. Although it is slightly newer, the Intel based iMac uses the exact same externals and mostly the same hardware as the revamped iMac G5. As I mentioned earlier, since the Intel transition is nowhere near complete, Apple now offers two iMac choices for their customers at the same price point: the iMac G5 and the Intel based platform, simply called the iMac. ![]()
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