Seeking PowerBook G4 7455 overclocking info

[boodle]

I know I'd be insane to try it, but might anyone know how to locate the PLL resistors on a Titanium PowerBook G4 1GHz? I've disassembled the machine but have been unsuccessful in locating the appropriate area on the logic board.

I've reviewed Motorola's PowerPC 7455 documentation but it didn't provide any assistance in locating the clock: http://e-www.motorola.com/files/32bit/doc/data_sheet/MPC7455EC.pdf

I've also reviewed Marc Schrier's excellent page on overclocking a Dual Quicksilver 1Ghz: http://homepage.mac.com/schrier/pmg4_1000_1200.html

I was successful in overclocking my Pismo years ago and, more recently, my G4 Cube. Yes, I know, 1066MHz or 1200MHz will likely cook the machine immediately. Call me crazy.

Thanks!

 

[boodle]

I've found a site in Japanese which once detailed overclocking a PowerBook G4 800Mhz to 866Mhz. This would be valuable info but the page seems to be missing: http://village.infoweb.ne.jp/~fwid8843/NewPBG4/NewPBG4.html

Doing a search for "PLL" or "866" in his weblog yields additional info on the jumper settings, but I can't read Japanese, unfortunately: http://village.infoweb.ne.jp/~fwid8843/index/diary.cgi

I'm game for trying to do a traceback using the processor specs as a guide, but I'm not sure where to start.

 

[jptrott]

Hope this helps

http://www.voelker.com/service/void.php

 

[boodle]

Thanks, I've seen that site. Unfortunately, the differences between the first and last generation Titanium motherboards are very significant.

 

[boodle]

I think this might be the area in which the clock and bus speed resistors are located. Can anyone confirm?

PowerBook G4 Titanium 1GHz

 

[boodle]

Success! Check out the whole thread here:
http://www.macmod.com/component/option,com_simpleboard/Itemid,29/func,view/id,900/catid,10/