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90nm 3GHz PPC 970FX by Summer
dmdimon sent in linkage to a Forbes story on the upcoming PPC chips and notes "IBM is said to be ready to deliver a new version of its PowerPC processor to Apple by the end of this year in from sizes of 130 nanometers to 90 nanometers...
Apple CEO Steve Jobs has already gone on the record saying that the G5 computer will contain PowerPC chips that run at 3 GHz by the summer of 2004. A mid-step between the current systems, which top out with two chips running at 2 GHz, and systems with chips as fast as 2.6 GHz would be a logical move come January..."
Does anyone even care about the leetness of their speed with Apple stuff?
Why my friend converted: Final Cut Pro, he's in the movie/TV biz.
You can't take the sky from me...
Most of the people editing the audio and video you're encoding on your x86 are using macs. Well, maybe not most, but a hell of a lot of 'em.
"If you're thinking what I'm thinking, you're right." -
This guy trolls for these types of posts, hoping to get modded up. His sig is the most disgusting thing ever, please mod down.
IBM's PPC compiler is XLC.
Who do you get to be an expert to tell you something's not obvious? The least insightful person you can find? -J Roberts
The two things you quote are very mundane and ordinary ways to get more performance from a CPU. Barring redesign, miniaturization and voltage drops are the ways to make hardware faster, and compiler optimizations are the way to make software faster. These are the bread and butter of performance improvement, and you give Apple/IBM entirely too much credit for doing these things. (And this is coming from someone who works on an IBM compiler.)
Having said that, the PPC compiler team's work has been amazing, and congratulations are due for the sheer magnitude of the performance boost. In a field where a 2% improvement is an achievement, 50% is incredible.
Patrick Doyle
I mod down every jackass who puts his moderation policy in his sig. Oh, wait a sec....
You don't need a "fully 64 bit OS" to get the speed improvements (although there still are memory limitations. see below). It would break a LOT of things, and really wouldn't be any improvement over the current offering. Unlike x86, PPC was designed for the 64bit transition from the start (even though it remained unused in Apple's product line for almost a decade), and so there is no speed penalty, whatsoever for running 32bit PPC code on a PPC970.
Specifically, the article states:
So far Apple's machines can see all the memory, they can't yet do 64-bit calculations. Present it with a 64-bit calculation, and a Mac with a G5 chip still breaks it into two 32-bit pieces. That's because, Glaskowsky says, Apple doesn't have a 64-bit operating system
Among it's other inaccuracies, it claims that a 32bit machine can only address 2GB.
They fault Apple for only allowing 8 GB of RAM in a desktop enclosure, even though this is still a significant improvement. This limit is still physical, there are 8 slots, and the largest capacity chips are 1024MB right now. They will work when 2048MB chips are released, increasing the max capacity of the existing line to 16GB.
As for the 64bit calculation bit, that's also incorrect. If the binary is compiled for the g5, then 64bit calculations will not be split as they are on 32bit architectures. The downside is that this binary will no longer work on 32 bit machines, for the obvious reasons. For best performance/compatability, two binaries, one 32bit, one 64bit, can be compiled and placed in the same Application bundle, making the difference between the two irrelevant to the user (only a single icon to click on, works on both systems, full 64bit calculation on the g5)
The biggest limit of the G5s at the moment is (and it's quite severe), to my knowledge, a single processes can still only address 4gb, because the size of void* is still 4bytes. Apple will need to duplicate all the libraries in 64bit form to make this work seamlessly, which will probably have to wait until 10.4.ummm, hate to rain on your parade but apple uses industry standards in newer boards: OpenFirmware, USB, Hypertransport. To do what you are suggesting would mean dropping standards compliance, something that runs counter to their profit model.
The policy of the United States is worse than bad---it is insane. -- Ludwig von Mises, Economic Policy(1959)
The Power4 is not the same chip as the PowerPC 970. IBM will probably begin selling PPC 970 machines eventually, but they haven't begun to ship them yet.