Richard Gilmore wrote: > What makes the G5 chip so much faster than the G4 if the "bits" aren't so > much of a factor? > First, I'd like to clarify that I didn't imply that the bits are not much of a factor. I tried to express that the bits are just as much a factor as many other elements or features, and that they should be considered as a whole. My point was that assuming that a G5 or Tiger upgrade was not worth it, simply because not *all* Tiger apps run as native 64-bit applications -- i.e. considering the bit-ness only, as it were -- was wrong. There are still plenty of architechtural improvements, both in the G5 *and* Tiger. But, since you ask, what makes the G5 chip faster? well, for on thing the 1.25GHz frontside bus, the 64-bit optimized execution core, 2 double-precision FPUs. Also, keep in mind that, as explained in other posts here, the math and core libraries of Tiger have been optimized to take advantage of the 64-bit technology of the G5. It is expected that Panther will execute faster on a G5, but Tiger will be even *faster*. dZ.