Hello everybody, this is my first post on this forum, I stumbled across this thread and just could not resist the temptation to ask rabidz7 and you all a few questions. I have a 15" high-res PowerBook, last model ever produced, with the Radeon 9700 and 2GB of DDR2 RAM; granted this is not my main machine, but I would love to push it a little more. I believe what makes the old PowerBooks feel sluggish compared to modern Macs (I myself own a 2011 15" MBP and the difference in speed is immense) is the extremely low bus speed. Basically I tried putting both my old Power Mac G4 (DA, 533MHz) and the PowerBook to the test and while the PowerBook is faster in some specific areas, the overall performance in 10.5.8 seems pretty much the same; they both utterly fail at playing 720p videos smoothly, but can play 480p ones fine (although the Power Mac's CPU usage is maxed out when playing an SD movie and the PowerBook's not). I strongly believe my PowerBook is being crippled by the system BUS, otherwise I cannot see how a 533MHz system from 2001 with only 640MB of RAM could perform almost as well as a 1.67GHz machine from:D2005. Anyone can confirm if my assumption is correct? If yes, is there any way to raise the BUS speed and would that be safe? I see rabidz7 has posted various configurations for CPU multipliers and I believe ramping up the BUS, but also lowering the multiplier would allow this machine to keep its original core clock (thus not generating more heat and keeping battery life acceptable) while potentially achieving BUS speeds up to 200MHz, this would not have any negative effect on the RAM as the DDR2 DIMMs in this model can run at up to 533MHz (I believe they are currently stuck at 333MHz, but feel free to correct me if I am wrong), but I fear this modification could damage other parts of the PowerBook.
Anyway, all I would need are some photos of where the resistors needed to configure BUS speed and multiplier are on the motherboard and I think I would give this a try. I have pretty good soldering skills and I believe I should be up to the task.