Macworld Labs recently took a look at Apple's new iMac Core 2 Duo and
posted some early benchmark results.
According to Intel, a similarly clocked Core 2 Duo
will provide 20% more computing power than a Core Duo (the chip that previously powered the Intel-based iMacs) at the same voltage. Macworld's comparison between a 2GHz Core Duo iMac and a 2GHz Core 2 Duo iMac showed an overall performance improvement of 10%, with some individual tests showing a gains of up to 20%.
Not surprisingly, Macworld's tests revealed that the quad-core, Woodcrest-based 2.66GHz Mac Pro handily outperformed the Core 2 Duo iMacs:
With twice the number of processor cores, all running faster than the iMac, the Mac Pro had a definite advantage in this match up. But because not all applications and tasks take full advantage of the Mac multiprocessing capabilities, most results showed the Mac Pro between 20 and 30 percent faster than the 2.16GHz iMac.