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G5 @ 2.5 GHZ *NOT CONFIRMED* but here's how

post #1 of 12
Thread Starter 
I actually got up at 3.30am to figure this out, as I was just lying there dreaming about all the goodness Steve will give us on Monday.

Ok. We know the G4 7450 (not Apollo) scales to 867GHZ

The increase between 7400 & 7450 was 3 extra stages. An increase of 75%. Put into clockspeed this gives us 500(g4) > 875(7450) so we've seen that a %increase in stages gives a near linear %increase in Mhz.

I also assume that a 7450 can clock to about 1GHZ, as there have been people foolish enough to do this, and this is probably what we'd expect (133mhz) from the last revision in July.

Now. Increasing the 7stage pipeline to 10 Stages (rumoured G5) would be an apx 40% increase.
This means our pretend G5 manufactured on the 7450 assy line would yield 1400MHZ.

Now. The die shrink. From 0.18 microns to 0.13 is another %increase of 40%. Now we have our pretend 1400MHZ G5 running at 1960MHZ

Now. Factor in the SOI. FWIW the rumour is that this adds about 30% to clockspeed. So our nice G5 is now running at 2548MHZ (2.5GHZ)

So If all these things are in place, And remember MOTO could be getting others (AMD?) to subcontract these parts, its not totally unreasonable to assume that (in an imperfect world) the G5 could debut somewhere between 1.6-2.2GHZ, and would be spot on with MOTO's PPC roadmap, AND a good reson for Apple to be creaming all over thier front Page.

*Not going back to bed for a bit, wondering how many flames I can amass!*

[ 01-05-2002: Message edited by: MarcUK ]</p>
post #2 of 12
I'll be called a moron....but I agree. This could be it. I would ROTFLMAO if that happened....
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post #3 of 12
If you are right I will kisss you!

I am ready to drop serious $ for the Mac you just described. I think you have great points.

Apple floundered for years at 500 Mhz, meanwhile they were signing deals with AMD, and cranking out newer chip designs with IBM (SOI) and MOTO to produce killer chips (64 bit maybe)

Apple knows damn well that the Mhz myth spin may be true but it wont sell computers.

I bet we see a new IBM sticker on Macs with the PPC logo again, or maybe a "Powered by IBM" sticker to compete with Inte more.

Can you imagine the TV commercials for a ? 2 GHz G4!

We may be blind-sided with these bad boys Monday AM!

I just hope Steve won't say: "Order today, they will be ready in Spring 02!". I will flip out! That really means June 19th...
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post #4 of 12
Pretty clever Marc, thanks. And I'd love to hear FUDUiMac comment, can't get enough of his posts.
post #5 of 12
Motorola, with Apple's help, and IBM's engineering talent (SOI), has had plenty of time to look at the G4 and it's bottlenecks. The G5 design began with a full understanding of the G4's failure to scale. It is clear to me when it is released, the G5 will be fast, very fast - and it will scale well.
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post #6 of 12
Ya. That would be pretty cool.
1 Peter 1:6-7
Powerbook G4 12" 1.33ghz, 60gig hd, 1.25 gigs ram.

Powermac G4 "Sawtooth" 400 mhz, 80gig hd, 384mb of ram, Rage 128 Pro graphics.
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1 Peter 1:6-7
Powerbook G4 12" 1.33ghz, 60gig hd, 1.25 gigs ram.

Powermac G4 "Sawtooth" 400 mhz, 80gig hd, 384mb of ram, Rage 128 Pro graphics.
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post #7 of 12
I'm no chip expert but if all this math adds up and we see a chip in the 2.5Ghz range I will buy it that day.

WHat would be even cooler is a MP version of this thing, a dualie 2.5 would be a cool .5 terahertz.

Niiiiice.

MSKR

PS I will also kiss you if ti comes true.
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post #8 of 12
post #9 of 12
imagine how fast a 2.5Ghz G5 would tear through a SETI unit.


Sweeeeeet....
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post #10 of 12
0.005 Terahertz, you mean...


-robo
post #11 of 12
a dualie 2.5 would be a cool .5 terahertz.[/QB][/QUOTE]

Eh?

1000MHz = 1GHz
1000GHz = 1THz
5GHz not= .5 THz\\
[grr, option equals didn't translate]

[ 01-06-2002: Message edited by: SkullMac ]</p>
post #12 of 12
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AppleInsider › Forums › Mac Hardware › Future Apple Hardware › G5 @ 2.5 GHZ *NOT CONFIRMED* but here's how