I'm trying to find two 1GB Crucial RAM modules for a Powerbook5,6 and their website tells me they only have 256mb and 512mb modules that they can guarantee are compatible. They DO have 1GB modules with all the same specs except the Component configuration. The "compatible" ones (256mb and 512mb) are 64Meg x 64 and the "non-compatible" one (1GB) is 128Meg x 64. Will two of the 1GB modules actually work in my Powerbook or should I trust Crucial's website? These are my Mac's specs: PowerBook5,6 Model Number A1106 Processor PowerPC 7447A or 7447B (G4) Processor Speed 1.5 or 1.67 GHz Number of Cores 1 Cache 64 KB L1, 512 KB on-chip (1:1) L2 System Bus 167 MHz These are the 512mb module's spec: Part Number: CT434057 Module Size: 512MB Package: 200-pin SODIMM Feature: DDR PC2700 Specs: DDR PC2700 CL=2.5 Unbuffered NON-ECC DDR333 2.5V 64Meg x 64 These are the 1GB module's spec: Part Number: CT12864X335 Module Size: 1GB Package: 200-pin SODIMM Feature: DDR PC2700 Specs: DDR PC2700 CL=2.5 Unbuffered NON-ECC DDR333 2.5V 128Meg x 64 Cheers!