> Thanks. That'll help some. Both AlBook 15" and 17" seem to share the same > features (no GPU sensor, two fans). AlBook 12" and iBook have only a > single fan. So always switching on both fans seems to make sense.
There are at least 2 revs of 15" and 3 of 17" ... PowerBook5,1 is 17" with nvidia chip iirc PowerBook5,2 is 15" rev 1 with ATI M10 PowerBook5,3 is 17" rev 2 with ATI M10 PowerBook5,4 is 15" rev 2 with ATI M10 PowerBook5,5 is 17" rev 3 with ATI M10 Then, there are the albook's 12" (2 of them) and the iBook G4... Ben.