Resolved Newertech 7448 2.0ghz questions

[appleintelcube]

Hello, everyone
I don’t remember well when I bought this CPU but recently I’ve found a Powerlogix Copper CPU heatsink so today I tried to install it to my G4 Cube
As you know it needs to do a 7448 firmware patch
So I did and managed to boot it up
When it was 1.8ghz, not bad, quite stable but after overclocked it to 2.0ghz, it wasn’t stable anymore
Here, I’ve read some threads related Vcore things so if I adjust the vcore volt to 1.35~1.4v, will it run stable?
How can I do that?

 

[dextructor]

"You damn lucky bastard!"

Lucky you if you could get an 7448, jokes apart congrats on your 7448 card. To my limited knowledge and looking at manuals for CPU upgrade cards, the voltages if aren't included in the manuals you can only change by changing by soldering specific points in the card and for it some skills are required. @JoyBed recently overclocked his PowerBook using this guide (https://www.overclock.net/forum/251-mac/1445164-ultimate-mac-overclocking.html#/topics/1445164) and there are some information about vcore as well. As someone who is looking to buy one 7448 for more than a year I beg you: Please be careful with this CPU's

 

[appleintelcube]

"You damn lucky bastard!"

Lucky you if you could get an 7448, jokes apart congrats on your 7448 card. To my limited knowledge and looking at manuals for CPU upgrade cards, the voltages if aren't included in the manuals you can only change by changing by soldering specific points in the card and for it some skills are required. @JoyBed recently overclocked his PowerBook using this guide (https://www.overclock.net/forum/251-mac/1445164-ultimate-mac-overclocking.html#/topics/1445164) and there are some information about vcore as well. As someone who is looking to buy one 7448 for more than a year I beg you: Please be careful with this CPU's

oh...Thank you for your reply
Actually for my PowerPC macs, I’ve had some “overclocking projects”
The 1st one is overclocking my 7448 dual 1.8ghz cpu (for g4 cube) to 2.0ghz more stably

And the 2nd one is also overclocking the 7448 single 1.8ghz(modified for g4 cube) to 2.0ghz more stably

and the last one is changing iMac g4 20” cpu(1.25 ghz) to 2.0ghz 7447a one(need to reball)

some time the first 2 cpus seem to be a little bit unstable.... especially the single core one..

 

[appleintelcube]

"You damn lucky bastard!"

Lucky you if you could get an 7448, jokes apart congrats on your 7448 card. To my limited knowledge and looking at manuals for CPU upgrade cards, the voltages if aren't included in the manuals you can only change by changing by soldering specific points in the card and for it some skills are required. @JoyBed recently overclocked his PowerBook using this guide (https://www.overclock.net/forum/251-mac/1445164-ultimate-mac-overclocking.html#/topics/1445164) and there are some information about vcore as well. As someone who is looking to buy one 7448 for more than a year I beg you: Please be careful with this CPU's

Finally, I got them. The 7448 series have vcore adjustments switches also....


it was found in a french macdouille(?) site and my 7448 single has been stable after adjusting like that, on the other hand the dual cpu hardly crashes down after about 1 hour running, so need to find a way to fix it(but much more stable than before)
Actually the single cpu has been modified to get enough voltage from the vrm. I added a capacitor(16v 2200f) and 2 pin connector to the gigadesigns VRM . Every time using an apple vrm or even the stratos power cube VRM 2, it crashes down because of the volt shortage.

 

[hardon]

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