<strong>Originally posted by rickag:
Question: Do you think the MPC7460 in the Powermac will be on 0.13µ die?</strong>
By definition yes. A MPC7460 is a 7450 fabbed on a 0.13u process. If they stick with 256 KB on-die L2, the 7560 would be ~55 sq mm. If they use 512 KB on-die L2, probably around ~80 sq mm. Straight scaling will give you pretty close estimates for die sizes, voltages and clock rate.
Whether they stick with the same packaging is a different story. Moto could solve the CPU upgrade problems by simply moving to PGA packaging like in the x86 world. But the odds are they will stick with the same old 29x29 mm BGA they've been using.
<strong>If so wouldn't it be likely the high end could clock to 1.3 to 1.4GHz???</strong>
It's a farm. High quality ears of corn (chips) are rarer than average and low quality ears of corn (chips). Here's a demonstrative example, not meant to be accurate. Hopefully I can do the formatting right:
1.4 | x
1.3 | x x
1.2 | x x x
1.1 | x x x x
1.0 | x x x x x
0.9 | x x x x x x
0.8 | x x x x x x
0.7 | x x x x x
--- --- --- --- --- --- ---
1.2 1.3 1.4 1.5 1.6 1.7 1.8Core Voltage
The "x" marks represent what the chips on wafer can run at. The 1.3 and 1.4 MHz chips would be very few, and would have to run at higher voltage. Like die size, power consumption scales by the square of the ratio of voltage increase or decrease, and as I recall, power consumption increases linearly with clock rate. So, a 1.4 GHz part would be very expensive because there are few of them (only 5 or 10 chips per wafer among hundreds in a wafer), and will run a lot hotter than a chip in the middle of the pack (1.8/1.5^2 = 44% for voltage increase plus another 40% for clock rate increase from a 1.5V 1 GHz chip).
Motorola's job as time goes on is to move the "x" marks to the left and to the top of the chart, just as good farmers will gradually learn how to work their farms to produce the best quality crops (yield). How those axes line up is all up to Motorola. I'd estimate about 60 to 90% clock rate increases for a process reduction of 30%. They are at 867 now, and getting 1.4 GHz is probably something they couldn't do off the bat. Perhaps in 6 months of refinement.
If they advance the process in some significant way, all bets are off.
<strong>Originally posted by DrBoar:
The case styling is a matter of preference, if they could do it "appear" to be slimmer along the the lines of the portable lines.</strong>
I'm hoping more along the lines of the iPOD myself. I don't like the curvy look of the El Capitan case much anymore. One design feature they probably need to improve is thermo control...
And er, shouldn't we have someone act as a referee to keep track of our predictions for us after MWSF02 is completed? We should have some sort rating for predicative ability beneath our names
[ 12-06-2001: Message edited by: THT ]</p>