On Jun 7, 2005, at 3:00 PM, Anand Keathley wrote:
Go here. <http://developer.apple.com/documentation/MacOSX/ Conceptual/universal_binary/> Under conventions it states, "Intel architecture 32-bit." So, this will be a big speed drop compared to a G5. Too bad too because they could have based it on one of Intel's other chips with 64 bit architecture like the "Xeon," for servers you can read about here, <http://www.intel.com/products/ roadmap/server.htm>. But Intel has no low voltage 64 bit chips. It appears that Apple has decided that they are willing to sacrifice desktop machines in favor of laptops:-(
This is for the initial developer platform, which is, in fact, a run- of-the-mill 3.6Ghz P4. No one has mentioned what chips Apple is going to use from Intel in the final production systems. Much speculation is going on around the Pentium M and new dual-core systems Intel has announced.
Also this isn't going to be a big speed drop from the G5 because the G5 was slower. There are numerous issues if you work down at the silicon layer, but if you're programming at the System API levels, this is largely irrelevant, the compiler takes care of that.
The G5 was NOT faster than the G4 because it was 64-bit, it was faster because it used Hypertransport and had a significantly faster memory and IO bus. (and a higher clock speed, to some extent)
Processor bit size (from 8 to 16 to 32 to 64) has had an increasingly smaller impact on the speed of the CPUs over the years. It's main impact has been in addressable memory space, and as we've gotten larger in bit size that's become less of a factor: 32-bit has a 4Tb address space...
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