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Old Dec 27, 2006, 05:28 AM   #1
MoBurkhardt
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Join Date: Dec 2006
Question G3 iMac DV overclocking

Hi there I just restored an old 1999 G3 iMac DV 400MHZ with slot-drive from the dead, and I feel it lacks a bit of power under it's hood. I already put RAM and HDD but the computing power is just not enough.

What I want to do is go into OpenFirmware and speed up the cpu and possibly the bus, I remember doing so on my sawtooth but I can't find the code plus that was a G4 and now I have a G3.

I also found this page (http://www.bekkoame.ne.jp/~t-imai/imacde1.html) that shows how to mechanicaly overclock up to 1GHZ but I want to be able to do it non physical if possible.

I know this isn't the hot topic now a days but maybe some of you will remember what they used to do and feel some nostalgia(is that a propper word?).

thanks
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Old Dec 27, 2006, 05:40 AM   #2
Queso
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Join Date: Mar 2006
Why not just bid on this? It's totally swappable with your existing logic board, the on-board G3 is an IBM one where the cache works at full chip speed unlike your existing Motorola chip, and it comes with double the VRAM you currently have.
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Old Dec 27, 2006, 08:14 AM   #3
Macmadant
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Quote:
Originally Posted by MoBurkhardt View Post
Hi there I just restored an old 1999 G3 iMac DV 400MHZ with slot-drive from the dead, and I feel it lacks a bit of power under it's hood. I already put RAM and HDD but the computing power is just not enough.

What I want to do is go into OpenFirmware and speed up the cpu and possibly the bus, I remember doing so on my sawtooth but I can't find the code plus that was a G4 and now I have a G3.

I also found this page (http://www.bekkoame.ne.jp/~t-imai/imacde1.html) that shows how to mechanicaly overclock up to 1GHZ but I want to be able to do it non physical if possible.

I know this isn't the hot topic now a days but maybe some of you will remember what they used to do and feel some nostalgia(is that a propper word?).

thanks
It can't be done without soldering, i brought this up ages ago, as my granddad owns one, now i've got his to recently purchase an ibook G3, with double the CPU speed, and 4X the VRAM
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