speed of the new powerbook vs P4
check this :
http://www.macobserver.com/shootouts/processor_notes.html
FWIW: I'm pleased to report that my "rough estimate" formula of G4/Pentium 4 overall performance has been proven to be pretty accurate by a fourth source:
http://www.barefeats.com/pentium4.html
In a nutshell, they pitted a PowerMac G4 DP 1.42 GHz vs. a Wintel Pentium 4 SP 3.06 GHz w/hyperthreading. They also threw in a PowerMac DP 1.25 and PowerMac DP 1.0 system as well.
I know BareFeats catches a lot of flak for their methodology, but in this case they seem to have their stuff together--The PowerMacs had 1.5 GB of DDR PC2700 RAM running OS X 10.2.4; the Pentium system had 2 GB of RDRAM PC1066 running WinXP Pro; all systems had 7200 rpm hard drives (80-120 GB), so I'd say they were fairly evenly matched up aside from the processors.
They ran a battery of tests, including Cinema 4D XL, Photoshop 7 (both multiprocessor-aware and single processor-only filters), and Bryce 5. I'm not a benchmarking expert but this seems a reasonable range of things to throw at the systems.
In any event, when you tally up the results:
3.06 GHz Pentium 4 w/HT system: total time 150 seconds
1.42 GHz DP PowerMac system: total time 162 seconds
1.25 GHz DP PowerMac system: total time 170 seconds
1.0 GHz DP PowerMac system: total time 225 seconds
Now, the System Shootouts "ballpark performance equivalence" formula has stood at:
1.0 GHz G4 appx. = 1.1 GHz Athlon appx. = 1.5 GHz Pentium 4, assuming 133 MHz FSB & SDRAM on the PowerMac.
For Dual Processor G4 systems, I've been figuring:
DP 1.0 GHz G4 appx. = SP 1.5 GHz Athlon appx. = 2.0 GHz Pentium 4, assuming the same as above.
So, I decided to see how far off the mark I am (at least with the DP systems).
Based on the above, a DP 1.42 G4 system w/a 166 FSB and DDR PC2700 should be roughly equal to a SP 2.84 GHz Pentium 4 system w/533 FSB and RDRAM PC1066, all else being equal.
150 seconds (3.06 P4) / 162 seconds (DP 1.42 G4) = about 8% faster overall. (3.06 / 2.84 equals...about 8% faster overall. So far, so good.)
The DP 1.25 G4 system should be about equal to a 2.5 GHz Pentium 4 system if I'm correct. (150 seconds / 170 seconds = about 12% faster. )
3.06 / 2.5 equals...about 22% faster. Whoops; the DP 1.25 is actually closer in real performance to about a 2.7 GHz Pentium 4 (3.06/2.7 = 13% faster). Still, not too far off.
Finally, the DP 1.0 GHz G4 should be about equal to a 2.0 GHz Pentium 4. (150 seconds / 225 seconds = about 33% faster.)
The DP 1.0 is closer to about a 2.3 Pentium 4 (3.06/2.3 = 33% faster).
My conclusion? The DP G4 systems are at *least* equal to a double-clockspeed *single* processor Pentium system, possibly more at lower speeds, but I'll leave it as is for now for the sake of simplicity. So, if you want to know ROUGHLY how your G4 stacks up:
For *single* processor G4s: Add 50% to your clockspeed to get the "Pentium 4 equivalence"
For *dual* processor G4s: Double the clockspeed of one of the processors to get the "Pentium 4 equivalence" (single processor P4, that is).
SO the new powerbook 1.33 ghz should be roughly equal to a 2.3 ghz P4...enough speed for everyone of you...
AGAIN it's the software that make the mac worth their price !!!
