observations and corrections...
Originally posted by mxpiazza
also... anyone with a g5 just take a look at the heatsink on the thing...
As people have already pointed out many times in many threads, the two 2Ghz G5's combine to produce less heat (94 watts) than a single 3.2Ghz Pentium 4 (over 100 watts). Looking at the size of the heat sink has nothing to do the amount of heat dissipation required. Apple chose a huge heat sink to allow them to run the fans at low speed (or off) and thus have a quieter system. I know of no modern desktop PC that approaches the noise level of the G5.
(Some may claim otherwise, but if you put them side-by-side you'll notice the difference.)
and if they're g5, i'll never post another reply on these forums again, that is how sure i am of this. no matter how much anyone wants to or can justify that g5's are *possible*, it's not going to happen.
Not very impressive since most people here are guessing that there will be a G4 in the new powerbooks. The reason has little-nothing to do with heat issues in the G5--as others have noted,
IBM's own documentation shows the G5 can consumer less power than the G4 when clocked 1.1Ghz. It has everything to do with the existence of a new Motorola MPC7457. Simple logic is, if Motorola doesn't have a committed purchaser of this chip, why bother designing and producing it? And where can this chip be used besides a Powerbook?
(Some will claim that that would go into the iBook, but then you were left with what Apple would be doing with the new IBM G3 chips which clock in at 1Ghz.)
Originally posted by eric67
This is why Intel has introduced the P4M, which really means portable, than of course the clock speed goes down seriously...
and still the P4M and P4 centrino have a clock adjustment system to extend battery life
There is no such thing as a Pentium 4 centrino. The "Centrino" line uses the Pentium M, which runs at a much slower clockspeed than the Pentium 4M but outperforms it in almost every test due to the cache-starved situation that occurs in notebook PCs. This is probably why Intel calls the whole thing "Centrino"--to distract the consumer from the low Mhz without acknowledging any "Mhz-myth"
I believe the Pentium 4Ms are running at over 2Ghz which isn't that far below the speed of most Pentium 4's. And if you are really stupid, you
can get notebooks running at over 3Ghz. Sure the CPU itself consumers over 100 watts, but whatever floats your boat.
In any case, unlike Intel notebooks, no special notebook versions of desktop chips need to be made in the G4 because the PowerPC uses a fraction of the power for the same performance. So such a design consideration doesn't apply.
Originally posted by wood_e
Apple and Motorola are basically finished. Motorola can't product processors well at all...
Why do I say this? G4s run hot in powerbooks.
While I'll agree that Motorola's yield problems have caused serious problems for Apple. Motorola and Apple are not finished and the G4 does not run hot.
The current G4's aren't even produced at 130nm yet! Comparatively, when the G3 went down to 130nm it ran into issues preventing it from clocking at 1Ghz (though rumor-mongers may say that this was deliberate) and the Apple probably won't introduce a G5 notebook until it is at 90nm. The CPU bandwidth issue you mention can be fixed in later iterations of the G4.
Plus, I don't see the iMac moving to the G5 anytime soon.