533MHz PC133 Sawtooth G4?!?!?!?

[Sawtooth811]

OMG. My G4 SAWTOOTH was 450MHz PC100 SDRAM with 100MHz Bus, and now it's 533MHz with PC133 SDRAM and 133MHz bus! It's acting VERY stable, and I had NO probems with it after running it in OS 9 with Unreal Tournament 2000 Demo. I built-in a small, but powerful fan on the side of the heat sync for cooling, and it seems to be working. Of course most of you know how I clocked it up. I know it isn't TOO mucch of a speed increase, but so what? I'm happy! But it's supposed to be 598MHz!!! But it wouldn't start-up from what I heard.

Can I put a G4 867MHz or faster G4 processor without it messing up the motherboard or clock decrease? Yeah, I know I need different cooling heat syncs or fans, and yes, I know that Quicksilver/Digital Audio processors WILL NOT FIT, so I'll find a MDD CPU or Sonnet.

 

[OrangeSVTguy]

hahaha too many Sawtooth###'s running around here

here something that you can try...

Well, you can over clock thru the OF Firmware.

reboot, and hold down the "CMD","OPT","O" +"F" keys.

enter the NVRAMRC editor (<enter> shows you should press the"return" key)

nvedit<enter>

Then type the following script exactly - including the spaces.

" /" select-dev<enter>
7efdc44 " clock-frequency" get-my-property 2drop !<enter>
" /cpus/PowerPC,G4@0" select-dev<return>
1fca0554 " clock-frequency" get-my-property 2drop !<enter>
7efdc44 " bus-frequency" get-my-property 2drop !<enter>
1fbf711 " timebase-frequency" get-my-property 2drop !

Type ^C (Control + 'C') to exit nvedit
save the script:

nvstore<enter>

enable the NVRAMRC by typing :

setenv use-nvramrc? true<enter>

and then reboot to the new time constant by typing

reset-all<enter>

This will save stuff you changed and reboot at a new speed.
Works for my G4 single. Changes from 500 for the CPU speed to 533, and buss speed goes from 100 to 133. About 1% or so.

worked for my 500 dual processor, it doesn't really OC anything. just changes and tricks the system profiler

 

[Sawtooth811]

hahaha too many Sawtooth###'s running around here

here something that you can try...


worked for my 500 dual processor, it doesn't really OC anything. just changes and tricks the system profiler

I'm not finished though. I have to put a 4 DIP switch on my Motherboard. Then hopefully, I'll get a MDD 133 (NOT 167) bus processor of any speed. Correct me if this isn't stable, but I'm no longer using the G4 under normal conditions.