Overclocking Your iBook to 600MHz

Cryptnotic writes: "The guys at Accelerate Your Mac have figured out how to modify the motherboard on the recent Apple iBooks to get them to run at 600MHz with a 100MHz bus speed. There are benchmarks comparing the OC'd iBook to some regular Apple desktop machines. However, what I am wondering most is how this overclocked G3 compares to the much more expensive Apple G4 Powerbook and if it makes it worth voiding the warranty." Remember, not recommended for your iBook.

Comments

Apple, marketing and processor crippling.

[irn_bru]

The G3 has been around for ages. It has long been suspected that the speeds chosen for use in iMac and iBooks are conditioned more my marketing factors then technological limitations, particularly the 66mhz system bus. Basically, IBM can clock them faster the Motorola can clock G4s, but it is unacceptable to have a faster chip in the cheaper machines (Altivec excepted).

The 3-5 degree raise in temperature seems entirely within the engineering limitations of the machine and I have to say that this mod looks very enticing indeed.

NOT recommended!

[Bud]

I performed the 600/350 modification to my iBook three weeks ago and IT DID NOT SUCCEED. When I had assembled the iBook again it wouldn't boot up. So I had to open the case again and move the resistors back. Luckily it works again. :-) Sturdy little bastard... Considering the amount of time I spent on planning and double-checking the mods, I can only assume that there are errors on the web page. I did the mods by hand, soldering very carefully and checking the result with a multimeter afterwards.

Another note: It's impossible to open the case without making ugly marks. You need at least three hands and several thin but nonflexible steel blades. Having done it twice (once for modding and once for demodding), I'm considering opening it once more in order to file down the ugly edges -- and repaint the inside in ultramarine blue. :-)

The only positive thing is that I now know how to replace the optical drive and hard disk. 10GB doesn't really cut it nowadays... I would really like one of those 48GB drives.

That's my 0.02 euro. And... if someone actually succeeds in performing the 600/350 mod, please let me know exactly what resistors you moved. :) Pleeeease!

--Bud

just for future reference

[4444444]

you should never use a mutimeter to test resistenc ein a circuit. 2 reasons for this are you are not mesearing the resistence of the resister you are mesauring the resistence of the hole circuit the resister is in. second reason multimeters in the ohms setting puts out a current to do the measuring and depending on what you tuch you could possibly fry something

Re:New iBooks

[nob]

Yeah, and everyone who's been holding off on an Apple (including me) until OS 10.1 was released just bought them. I live in Michigan, and had a small delay in my shipment too. Apple told me it was due to unforseen demand. (Who couldn't have forseen this though?)