[Lava Lamp Freak]

I upgraded the memory in my iMac to 4GB and have the 1GB stick left over that came in it. Will it work in my older PowerBook G4 1.5GHz? It seems like it would since it is the same pin count and it is DDR2. I can't find anything online that says otherwise.

[ibook_steve]

Assuming your iMac is Intel, no, it won't work. No Powerbook supported DDR2, only DDR. And DDR2 is keyed differently, so it wouldn't even fit.

Steve

[Lava Lamp Freak]

The last revision of the PowerBook 1.67 supported DDR2. I misunderstood the OWC website and thought my model would support it to but I have the 1.5.

[mduell]

The memory from the only iMac that supports 4GB will not work in any 1.5Ghz PowerBook.