Die neuen G5 oder eher nicht

p.i.t. · 24. Mai 2004

schade... da hat der herr jobs seinen mund etwas gar voll genommen letztes jahr... ich hör schon die hämische schadenfreude der pc-fraktion...

ks23 · 24. Mai 2004

An 3GHz bis September glaub ich schon, nur an der obenstehenden Konfiguration nicht! Warum? Weil's von Croquer kommt

Da hört sich das hier einfach realistischer an:

Architosh Staff (info@architosh.com)

21 May 2004

_Apple Performance Lead to Jump Ahead Once Again, Source Says New Power Macs May Feature 2.0 HT Spec

While the situation at IBM's Fishkill, New York, based chip fab facility is believed to be improvingas IBM acknowledged problemssources close to both IBM and the HyperTransport Consortium say Apple's performance lead will jump yet again ahead of Intel with the widely anticipated (and belated) Power Mac G5 updates. These machines are believed to be sporting a HyperTransport bus at rates faster than the current 1.0Ghz speed.

HyperTransport 2.0

"We've been hearing that Apple has been pushing hard to implement technology based on the 2.0 specifications," says our source. The 2.0 specification for HyperTransport was released back in early February of 2004. If implemented, Apple's upcoming Power Mac G5 systems could have bus rates as high as 2.4GHz if executed in 1:1 clock ratios with maximum aggregate bus bandwidth of 22.4 Gigabytes/sec. While possible, our source cautions that time tables for this implementation were expected for the second update. Additionally, Apple may likely stick with 1:2 clock rates between bus and core processor frequency. This would pin the bus at 1.0, 1.1 and 1.2Ghz for the expected 90nm based G5 chips.

It was widely expected that when Steve Jobs promised Apple would reach 3Ghz by the following summer that an interim update to the G5 Power Mac line would happen in the first quarter of this year (2004). With the 2.0 HyperTransport spec just released in February it was not possible for Apple to deliver that bus technology update back then but it has increasingly looked possible for them to make that happen now with this late update.

Graphics Powers

More important still than just a vast jump in bus frequency is the tie-in to PCI-Express bus technology which can vastly improve graphics performance by offering four times the bandwidth than current AGP 8x buses which max out at 2 GB/sec by way of octal-pumps of data. 16x PCI Express can deliver a total bandwidth of 8 GB/sec. Such support of PCI Express can be critical to Apple's support of the latest next-generation graphics cards such as the 3DLabs' Wildcat Realizm, ATI Radeon X800 and Nvidia GeForce 6800. And such cards are critical to Apple's success in pushing further into architecture and engineering CAD, CCAD, MCAD and DCC markets.

Architosh Analysis: We've always wondered why AMD was able to implement the maximum 1.6Ghz in the initial HT spec while Apple was not capable of doing this. Perhaps it was simply because Apple came out with machines running at 1.8 and 2.0GHz -- meaning they were forced to go to 1:2 ratios for the entire line. With the new spec implemented Apple could go to 1:1 ratios and pick up performance with little necessary improvement in the core frequency of the G5, while gaining the PCI Express benefits at the same time.
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