Powerbook G4 15" overclocking - UPDATE

ajikan

Diamond Member
Aug 20, 2005
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EDIT: Just for future reference if anyone else is interested in doing this:
I did some of the soldering, and now my 15" Powerbook is at 1.5Ghz and stable. (was at 1.33Ghz before) I didn't do the complete voltage mod because I didn't overclock too much (1.67+) so it wasn't necessary, but I added 0.025V to the CPU (default 1.25V) just in case, by doing some soldering. (So now the CPU Voltage is at 1.275V)
But I have no idea how to prove this to you guys.. I don't have any "before" screen captures. But now my "About this Mac" says "1.5ghz PowerPC G4". And also under CPU Director, it says 1500Mhz.
The soldering wasn't so hard, but it's still very risky. This was my FIRST time doing any soldering, and everything turned out to be successful. :) I'd recommend those who wish to try this to seek help from an experienced person first..


I found a link to a guide on overclocking a 15" G4 Powerbook by soldering/desoldering some parts on the logic board.
Here it is: http://translate.google.com/translate?u...ie=UTF-8&oe=UTF-8&prev=/language_tools
It's in French, translated into english with google.

Has anyone tried this before? People have posted successful overclocking results on the website.. but that's the only website that has any info on it. So I'm a bit skeptical on trying it on my own powerbook.. although it'd save me a few hundred with the overclock!
 

chcarnage

Golden Member
May 11, 2005
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Laptop OCing is for rich tinkerers or obsolete hardware... Nobody knows if the cooling system of the PowerBook can handle the additional heat. Also, why do you say this would save you several hundred bucks? The price difference in the second-hand market between an 1.33 Ghz and a 1.5 Ghz PowerBook G4/15" should be about one hundred, not several hundred dollars.
 

ajikan

Diamond Member
Aug 20, 2005
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^It can boost the clock speed up to 1.67Ghz and still be stable..
To upgrade the CPU on a powerbook, I'd needs a full replacement of the logic board (the CPU is embedded), and one logic board costs several hundred dollars. x__x
 

chcarnage

Golden Member
May 11, 2005
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Well, it might but not necessarily. Some other PowerBooks of the same series may run stable at 1.83 Ghz while others can't be overclocked at all. There is always some variance in the CPU quality.

What do you expect from a 11% CPU speed bump that you've considered spending that much money on it? I fear you overrate the potential win and underestimate the risk a bit.