sr ferenczy wrote: > On Jun 9, 2004, at 9:16 AM, Steven wrote: > >>sr ferenczy wrote: >> >>>http://www.apple.com/powermac/design.html >> >>It seems to me that if I read the diagram correctly one of the >>processors will be much hotter than the other... > > no more so than in a radiator-cooled car engine, where the coolant > flows in a continuos loop past the first cylinder before the last.... I thinks so. In a car engine the cylinders are part of one block that has to be cooled. I'm not sure if the cooling fluid passes the cylinders one after the other (in a series) instead of passing the cylinders in parallel at the same time. I would say the latter would be possible and preferable. I'd surprise me if it were not done that way. Anyway the comparison is not valid i.m.h.o. The processors are two separate units whereas the engine is one block. Steven