That is: An oc iBook (rev A, at 400MHz) can't boot with 9.0.4.
But, after replace Mac OS ROM v3.7 with older version v3.0 (that came with 9.0) the iBook startup and work fine.
Where can i get one patch to allow a v3.7 ROM file will be used on overclocked iBook? other sugestion?

If it works, why not leave it alone, Pancho?

[TimmyDee51]

How hot does that thing run?

[vr5150]

I overclocked my iBook and it would not boot up.
I then returned it to normal.
I was hoping for some feedback on the forums and everyone was negative about my doings.

I still would like feedback on problems with overclocking.

[TimmyDee51]

I can understand where the negative feedback came from. I don't condone it, but I can understand it. Laptops are built with such thin tollerances when it comes to heat that OCing one will cause the greater probability of problems than in a desktop. My guess is that iBooks are right on the threshold of the speed/stability envelope. Take a look at the move they made with the new iBooks: The cache, although smaller, is on chip. This might have been to reduce heat. I know in my iMac when I OC my cache to 3:2 or even 2:1, the temp rises at least 5-10 F. By removing the L2 cache, they removed a large source of heat and thus may be able to run the processor faster.

If you want, you can underclock your cache using Powerlogix profiling utility, but that would undermine the OCing. Also, there might be a firmware issue (I thought I heard that somewhere). Unfortunately, iBooks are just not very OCable.

[drewman]

1st generation iBooks are VERY overclockable. The have 333Mhz chips in them and were clocked at 300Mhz to not overshadow the PowerBooks of the time.

I am writing this on a 1st generation iBook overclocked to 400Mhz and has been rock solid for over a year now.

drewman

[vr5150]

I tried it once but I had 9.04 installed.
Now I am reading it is not compatible with 9.04.

Is this true?
Anyone out there using 9.04 with the overclocking mod?
Will it be compatible with OS X????

After you do the mod do you have to do anything like reinstall software? zap pram?

Originally posted by vr5150:
I tried it once but I had 9.04 installed.
Now I am reading it is not compatible with 9.04.

Is this true?
Anyone out there using 9.04 with the overclocking mod?
Will it be compatible with OS X????

After you do the mod do you have to do anything like reinstall software? zap pram?

--
I suppose that this oc iBook is not compatible with Mac OS ROM included in 9.0.4 because the Zap PRAM method only allow to startup few times. The only solution for me: take out the 'Mac OS ROM' v3.7 for replace with same file v3.0 from MacOS 9.0
Mac OS X (pr) works fine, but not all ok as it is a beta release.

Haven't overclocked by iBook yet, but I tried to run MacOs 9.1 with the Mac OS ROM file 3.0, of Mac OS 9.0. It didn't boot with that combination.
Anyone tried Mac OS 9.1 on an overclocked iBook?