relimw said:
Yeah, but how long has it been since they *actually* started shipping the 2.5s?
I doubt the bump to PCI Express, would be nice, but not likely. Also standard 1GB isn't likely, maybe 512MB standard.
But I am ready for my dual 3GHz....after all Steve promised almost 2 years ago.
When you look at the iMac & mini, its evident that Apple's put a lot of resources towards packaging (and cooling) issues instead of raw CPU speed.
At first glance, this doesn't necessarily forbode well for another big CPU GHz jump coming along anytime soon, as you can argue that they've not been focused on hardware.
On the other hand, the liquid-cooled 2.5 is a genuine "field trial" of how the cooling technology performs
before it is absolutely required for really hot chips. This is a very smart and deliberative technology risk management move by Apple.
Similarly, Apple has used both 1/2 and now 1/3 ratio's on the G5's FSB...its not rocket science to see that a 3GHz at 1GHz FSW is thus very easily doable. Again, an underlying enabling technology has been moved in place.
If we want to do some "crazy" forward-leaning, consider the 2.5's FSB @ 1.25GHz which times three would support up to a 3.75GHz g5. This again means that Apple at least has the groundwork in place to scale up, possibly even to go after the crown jewels marketing claim of "FASTEST clockspeed". Now I'm not saying that this is likely at this time: instead, I'm pointing out that again, the groundwork has been moving into place...it probably wouldn't be a wise marketing move for them to jump to a "up thru 3.5GHz" lineup without having first milked 3.0GHz.
Other factors that need to be considered are:
- The PowerMac's are still being built off of two different motherboards. Its unlikely that we'll see Apple go to three mobo's, so something needs to go. If Apple can't roll-out the CPU/mobo they really want on the high end on their announcement schedule (eg, June), we couild see an interium revision where all the models are being offered on just one motherboard.
- Apple's business plan needs to include how they're going to consume the G5's that fail to meet whatever speed requirements in order to be cost-effective by having a good overall yield. For example, the iMac currently eats up the "slow" G5's that can only be certified at 1.6 and 1.8. If the yield is turning out a quantity of G5's that can't meet 2GHz that exceeds the iMac demand, then the bottom of the PowerMac line is likely to remain a 1.8GHz. And naturally, the landscape gets complicated with the dual core chips.
Finally, reading between the lines on Apple's current product line-up, we see that the PowerMac's low-end/high-end motherboard dividing line is currently set between the DP 1.8 and the DP 2.0, whereas for Rev A, it was between the SP 1.6 and SP 1.8 IMO, this upward wouldinfer some good news on G5 yields. Its oversimplistic to assume a continuation of this trend (which would infer that a 2GHz could be on the "low-end" board on the next revision cycle), but it is an eventuality of sorts. This might suggest that the next lineup could be an aircooled 2.0 on the bottom and 2.5 and 3.0 liquid cooled.
-hh