[kenazo]

Does anyone know if the 550mhz logic board will work in the 400/500mhz series Powerbook? I haven't held one in my hands but it looks the same as the 400/500...

I know the 400/500mhz are interchangeable...

Thanks!

[euphras]

The problem will be the heat pipe arrangement, since the heat pipes (in the Ti´s they´re attached to the top titanium bezel) differ comparing the different Ti-incarnations. A 400/500 case could be insufficient for proper cooling of a 550 MHz G4. I also doubt that the mainboard design is 100% identical, therefore it might be that the plate of the heat pipe that has to be attached to the G4 die is in a slightly off-center location when the parts are assembled.

[kenazo]

Thanks euphras! That's exactly the information I needed to hear. I can't tell the exact spacing of the dies from the pictures but they would be very very close...of course close is not enough in this case

I'll stick to the 500mhz then.

[ChrisF]

Originally posted by kenazo:
Thanks euphras! That's exactly the information I needed to hear. I can't tell the exact spacing of the dies from the pictures but they would be very very close...of course close is not enough in this case

I'll stick to the 500mhz then.

Beyond that, the 550MHz isn't fast. In everyday use, the 500 is probably faster due to the larger L2 cache- the 550 has only a 256k cache and that really cripples the computer's speed.